深部单一严重突出煤层煤巷掘进卸压防突技术  

Pressure released and outburst prevention technology of seam gateway driving in deep single serious outburst seam

作　　者：孟贤正[1,2] 王中华[1,2] 陈国红[1,2] 张永将[1,2] Meng Xianzheng Wang Zhonghua Chen Guohong Zhang Yongjiang(National Key Lab of Gas Disaster Detecting, Preventing and Emergency, Chongqing 400037, China Gas Research Institute, Chongqing Research Institute, China Coal Technology Engineering Group, Chongqing 400037, China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司瓦斯研究分院,重庆400037

出　　处：《煤炭科学技术》2016年第12期75-80,共6页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2011ZX05041-003);中国煤炭科工集团有限公司青年基金资助项目(2014QN002);中煤科工集团重庆研究院有限公司青年基金资助项目(2014QNJJ22)

摘　　要：为消除深部单一严重突出煤层煤巷掘进的突出危险,理论分析了深部煤巷突出的复合能量及力学特点,提出了预掘底板岩巷卸压防突技术;结合丰城矿区实际,采用数值模拟方法确定了预掘底板卸压岩巷布置在待掘煤巷正下方8~12 m处。实践表明：预掘底板岩巷卸压防突效果显著,围岩最大位移为4.1 cm,围岩出现分区破裂现象,破裂区一般为4个;每米钻孔瓦斯初始流量、煤层透气性系数可达原始煤层的14.39、55.70倍,瓦斯抽采浓度提高近5倍,单孔抽采量提高近10倍;煤巷效检指标无超标现象,煤巷掘进速度由40 m/月提高到100 m/月,实现了煤巷安全快速掘进,对类似条件矿井具有重要借鉴意义。In order to eliminate the outburst danger of a inine seam gateway driving in the deep mine single serious outburst seam, the paper theoretically analyzed the outburst composite energy and mechanics features of the deep seam gateway and provided the pressure released and outburst prevention technology of the preheading floor rock roadway. The numerical simulation in combination with the actual Fengcheng Mining Area was applied to determine the pre-heading floor rock roadway should be located at 8 - 12 m underneath of the seam gateway to be driven.The practices showed that the pressure released and outburst prevention effect of the pre-heading floor rock roadway was remarkable, the max displacement of the surrounding rock was 4.1 cm, the partition cracking phenomenon occurred in the surrounding rock and there were four cracking zones generally.The initial gas flow of per meter borehole and the permeability coefficient of the seam could be 14.39 and 55.70 times higher than the insitu seam,the gas drainage density was improved by 5 times and the gas drainage volume of a single borehole was improved by 10 times.There was no over limit phenomenon occurred in the effective inspection index of the seam gateway,the driving speed of the seam gateway was improved from 40 m/month to 100 m/month, and the safety and rapid driving of the seam gateway was realized, and could provide important reference significances to the mines with the similar conditions.

关 键 词：单一严重突出煤层 深部煤巷突出 复合能量 预掘底板岩巷 卸压防突 

分 类 号：TD713[矿业工程—矿井通风与安全]