矿井瓦斯设计说明书

目 录

第一章 概述 .................................................................................................................... 错误！未定义书签。

1.1矿井概况 .............................................................................................................................................1

1.1.1地理概况 .................................................................................................................................1 1.1.2地形地貌 .................................................................................................................................1 1.1.3气象 .........................................................................................................................................1 1.1.4河流 .........................................................................................................................................1 1.1.5地震 .........................................................................................................................................1 1.1.6地温 .........................................................................................................................................1 1.1.7冲击地压 .................................................................................................................................1 1.1.8水文地质条件 .........................................................................................................................1 1.1.9环境状况 .................................................................................................................................1 1.1.10井下通信 ...............................................................................................................................1 1.1.11供水水源 ...............................................................................................................................1 1.1.12矿井电源 ...............................................................................................................................2 1.1.13煤层自燃倾向性 ...................................................................................................................2 1.2矿井基础资料 .....................................................................................................................................2

1.2.1井田范围及地质储量 .............................................................................................................2 1.3.含煤地层及煤层 ................................................................................................................................2

1.3.1含煤性 .....................................................................................................................................3 1.3.2可采煤层 .................................................................................................................................3 1.3.3煤层顶、底板情况 .................................................................................................................4 1.3.4煤尘爆炸指数及煤尘爆炸危险性 ..........................................................................................4 1.3.5煤层瓦斯压力 .........................................................................................................................5 1.3.6矿井瓦斯等级 .........................................................................................................................5 1.3.7矿井煤（岩）与瓦斯（二氧化碳）突出危险性 ..................................................................5 1.4矿井开拓、开采概况 .........................................................................................................................5

1.4.1井田开拓方式 .........................................................................................................................5 1.5采煤工艺及主要设备 .........................................................................................................................6

1.5.1采煤方法 .................................................................................................................................6 1.5.2采场支护及顶板管理 .............................................................................................................6 1.6开采顺序 .............................................................................................................................................6 第二章 矿井瓦斯储量及可抽量预测 ..............................................................................................................7

2.1矿井瓦斯储量计算 .............................................................................................................................7

2.1.1煤层瓦斯含量 .........................................................................................................................7 2.2可采煤层的瓦斯储量总和 .................................................................................................................9

2.2.1矿井每一个可采煤层的煤炭储量 ..........................................................................................9 2.2.2矿井每一个可采煤层的瓦斯含量 ..........................................................................................9 2.2.3各可采煤层的瓦斯储量及其总和 ..........................................................................................9 2.3可抽瓦斯量预测 ...............................................................................................................................10

2.3.1可抽瓦斯量 ...........................................................................................................................10 2.3.2抽放率指标 ........................................................................................................................... 11 2.3.3抽放率判定 ........................................................................................................................... 11

第三章 瓦斯涌出量预测计算 ........................................................................................................................12

3.1煤层瓦斯主要参数 ...........................................................................................................................12

3.1.1煤的孔隙率 ...........................................................................................................................12 3.1.2瓦斯含量分布梯度 ...............................................................................................................12 3.1.3煤层透气性系数 ...................................................................................................................12 3.1.4瓦斯放散初速度 ...................................................................................................................12 3.2矿井瓦斯涌出量预测计算（采用分源预测法计算） ....................................................................12

3.2.1回采工作面瓦斯涌出量预测计算 ........................................................................................12 3.2.2开采层相对瓦斯涌出量 .......................................................................................................12 3.2.3邻近层相对瓦斯涌出量: .....................................................................................................13 3.2.4掘进工作面瓦斯涌出量预测计算 ........................................................................................14 3.2.4.3掘进工作面绝对瓦斯涌出量............................................................................................15 3.2.5生产采区瓦斯涌出量预测计算............................................................................................15 3.3矿井瓦斯涌出量预测计算 .......................................................................................................16

第四章 矿井抽放瓦斯的必要性和可行性分析 ............................................................................................17

4.1矿井瓦斯来源分析 ...........................................................................................................................17

4.1.1矿井瓦斯来源及涌出构成 ...................................................................................................17 4.1.2回采工作面瓦斯来源及涌出构成 ........................................................................................17 4.2抽放瓦斯的必要性 ...........................................................................................................................17

4.2.1回采工作面抽放瓦斯必要性分析 ........................................................................................17 4.2.2掘进工作面抽放瓦斯必要性分析 ........................................................................................17 4.3抽放瓦斯的可行性分析 ...................................................................................................................17 4.4抽放瓦斯效果预计 ...........................................................................................................................17

4.4.1回采工作面瓦斯抽放量 .......................................................................................................17 4.4.2掘进工作面瓦斯抽放量 .......................................................................................................18 4.4.3采空区瓦斯抽放量 ...............................................................................................................18 4.5矿井瓦斯抽放量 ...............................................................................................................................18 第五章 矿井抽放瓦斯方法的选择 ................................................................................................................19

5.1矿井瓦斯抽放方法的选择 ...............................................................................................................19

5.1.1回采工作面瓦斯来源及构成................................................................................................19 5.1.2 本煤层瓦斯抽放方法 ..........................................................................................................19 5.1.3邻近层瓦斯抽放方法 ...........................................................................................................19 5.1.4采空区瓦斯抽放方法 ...........................................................................................................19 5.1.5其它情况 ...............................................................................................................................19 5.2矿井瓦斯抽放系统选择 ...................................................................................................................20 5.3瓦斯抽放参数的确定 .......................................................................................................................20

5.3.1钻场布置 ...............................................................................................................................20 5.3.2本层瓦斯抽放钻孔参数 .......................................................................................................21 5.3.3邻近层瓦斯抽放钻孔参数 ...................................................................................................21 5.3.4采空区瓦斯抽放布置原则和参数 ........................................................................................21 5.4钻场钻孔布置的要求 .......................................................................................................................21 5.5封孔方式、材料及工艺 ...................................................................................................................21

5.5.1 邻近层封孔工艺 ..................................................................................................................21 5.5.2 本煤层封孔工艺 ..................................................................................................................21 5.5.3 预抽煤层瓦斯的钻孔量 ......................................................................................................21

第六章 瓦斯抽放系统管路和设备布置及选型 ............................................................................................22

6.1抽放管路布置及选型计算 ...............................................................................................................22

6.1.1井下敷设抽放管路的要求 ...................................................................................................22 6.1.2抽放管路的附属装置 ...........................................................................................................22 6.1.3抽放管路的布置及选型如图示。 ........................................................................................22 6.1.4抽放管路的布置 ...................................................................................................................22 6.2瓦斯抽放管路计算 ...........................................................................................................................22 6.3抽放设备布置及选型 .......................................................................................................................24

6.3.1抽放设备布置及选型要求 ...................................................................................................24 6.4瓦斯抽放泵选型计算 .......................................................................................................................24

6.4.1瓦斯抽放泵的选型原则 .......................................................................................................25 6.4.2瓦斯抽放泵流量计算 ...........................................................................................................25 6.4.3瓦斯抽放泵压力计算 ...........................................................................................................25 6.5瓦斯泵选型 .......................................................................................................................................25 6.6抽放管路、设备的安装要求 ...........................................................................................................25 第七章 瓦斯抽放安全技术措施 ....................................................................................................................27

7.1抽放系统安全措施 ...........................................................................................................................27

7.1.1抽放钻场、钻孔施工防治瓦斯措施 ....................................................................................27 7.1.2管路防腐蚀、防漏气、防砸坏、电气防爆、防静电、防带电、防底鼓措施 ................27 7.1.3立井(立眼)、斜井(斜巷)管路防滑措施 ............................................................................27 7.1.4地面管路防冻措施 ...............................................................................................................27 7.2抽放瓦斯站安全措施的要求 ...........................................................................................................27 第八章 瓦斯的综合利用及瓦斯抽放的配套设施 ......................................................................................28

8.1抽放瓦斯的综合利用及评价 ...........................................................................................................28

8.1.1瓦斯的综合利用 ...................................................................................................................28 8.1.2瓦斯利用的评价 ...................................................................................................................28 8.2给排水、采暖及供热（地面抽放瓦斯时） ....................................................................................28

8.2.1给排水 ...................................................................................................................................28 8.2.2采暖及供热 ...........................................................................................................................29 8.3供电及通信 .......................................................................................................................................29 8.4监测监控系统 ...................................................................................................................................29

8.4.1监测监控参数的确定及设置地点 ........................................................................................29 8.4.2监测监控系统的自动化程度及设备选型 ............................................................................29 8.4.3检测仪器仪表的配备 ...........................................................................................................29

参考文献 ..........................................................................................................................................................30

摘要：通过理论分析，进行了瓦斯综合抽放技术研究。分析了瓦斯赋存及流动规律、抽放方

法、引起事故危险因素等进行了分析，为合理确定工作面瓦斯抽放方法提供了理论依据。论文针对矿井瓦斯地质影响因素，探讨了其对煤层瓦斯含量的影响，并从瓦斯安全管理、火源安全管理等方面给出了瓦斯事故防治措施。

关键词：煤矿安全 瓦斯赋存状态 瓦斯抽放方法 瓦斯地质影响因素

ABSTRACT: Through theoretical analysis, has carried on the comprehensive gas

drainage technology research. Analyzed, drainage method and flow law of gas occurrence and cause accident risk factors are analyzed, and reasonable to determine the gas drainage method provides a theoretical basis. Paper in view of the mine gas geological influence factors, discusses its influence on coal seam gas content, and from the gas safety management, fire safety management of gas accident prevention measures are given.

KEYWORDS: Coal mine safety Gas occurrence state Gas drainage method

Gas geology factor

第一章 概 述

1.1矿井概况 1.1.1地理概况

金沙县4号煤矿位于金沙县东南部，矿区地理坐标为：东经106°22 38 -106°23 48 ，北纬27°16 19 -27°17 28 。矿区距金沙县城直线距离约40km，交通较为便利。

1.1.2地形地貌

金沙县4号煤矿地形总体上受区域性地质构造和岩性控制，矿区地貌属中低山地貌。矿区最高点位于矿区南部边界外，其海拔标高+1612.00m，最低点位于矿区东北部一落水洞附近，其海拔标高+1155.00m，相对高差为457.00m。矿区内地势总趋势为南部高、北部低。

1.1.3气象

区内多年平均气温14.5℃，年降水量900～1100mm，平均降雨量1048mm，属亚热带湿润季风气候，冬无严寒，夏无酷暑，雨量充沛，无霜期260～280天。年均总日照时数为1112小时，年平均温度15℃。主要灾害性气候有干旱、秋风、倒春寒、秋绵雨、冰雹、暴雨等。总的气候特点是：春迟夏短，秋早冬长，水热同季，干湿异期，四季分明。

1.1.4河流

矿区范围内无大的河流经过，区内地表水主要为沟谷季节性小溪流。溪沟水随季节变化而变化，无较大的地表水体。

1.1.5地震

根据国家地震局、建设部1992年颁发的《中国地震烈度区划图(1990)》及贵州省建设厅“黔城设通发1992〔230〕号”文件，场地地震基本烈度为Ⅵ度。据《建设抗震设计规范》(GB50011—2001)抗震设防烈度为6度。

1.1.6地温

根据提交的《贵州省大方县某矿资源储量核实报告》。井田内地温最大值23.76°C，地温变化梯度1.55～1.61°C/100 m，未见地温异常。属地温正常矿井。

1.1.7冲击地压

地质资料及矿方提供的资料中均没有提及关于冲击地压的资料，本矿区内也无冲击地压的历史记录，矿井暂按无冲击地压矿井考虑。

1.1.8水文地质条件

本矿最低开采标高为+1000m，最底侵蚀基准面标高+1140m。直接充水水源为含煤岩系的龙潭组基岩裂隙水、小煤窑采空区积水，属于以裂隙充水为主的矿床，区域承压水对井田采矿范围无较大影响。矿井水文地质条件属中等类型。

1.1.9环境状况

本矿井地处山区，环境容量较大，设计对生产过程中产生的废水、废气、噪声、矸石等污染物（源）采取控制处理后排放或临时堆弃，并对环保工程列有专款。

1.1.10井下通信

矿井行政电话和调度电话共用一台程控调度机，设备选用DHK-1型矿用调度总机，电话站设在矿办公楼内。井下用户话机为按键话机，型号为HAK-1本安型。电话站至井下选用MHYV 1×4×7/0.37型矿用电话电缆，用户话机线选用MHYV 1×4×7/0.28软电缆，以完成矿井的内部通讯。井下电话设置地点是绞车房、绞车下部摘钩处、采掘工作面、局部通风机等。

1.1.11供水水源

生活用水水源：取自矿井附近的山泉水，水源地距地面工业场地约0.5km。涌水量10-15m/h。水质较好，通过工业场地水池蓄水后，用管道引至矿区生活及生产水池，可满足矿井生活用水需要。

生产用水：矿井生产用水主要来源于经污水处理系统处理后的矿井水，不足时由山泉水补充。

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