煤矿孤岛工作面瓦斯防治  

Gas prevention and control of island coal face in coal mine

作　　者：郭壮壮 

机构地区：[1]山西高河能源有限公司,山西长治047100

出　　处：《煤炭科技》2017年第3期194-196,共3页Coal Science & Technology Magazine

摘　　要：煤矿孤岛工作面,综合其地质环境和采煤工艺,为最大限度降低瓦斯浓度,在采煤过程中端头处隅角通风采用脉动通风,从根本上解决了上隅角瓦斯积聚问题;巷道通风主要是压入式,工作面回风不通过风机、风管,对设备污染小,在有瓦斯涌出的工作面采用这种方式比较安全;根据瓦斯含量情况结合其他影响因素,煤层瓦斯抽放采用未卸压钻孔抽放。在抽放过程中,采用了人工增加煤层透气性系数的措施:水力压裂和交叉钻孔。钻孔的瓦斯涌出量由压裂前的0.3m3/min,增至压裂后的0.44~4.8 m3/min,相同条件下提高抽放量0.46~1.02倍。Combined with its geological environment and coal mining process,To minimize the gas concentration on island face in coal mine,pulsed ventilation was used in corners at the end in the process of coal mining,which has solved the problem of gas accumulation in the upper corner. The ventilation way is forced ventilation in roadways,and the return air of working face does not pass through fans and pipelines,the pollution of return air on device is little,it is relatively safe for using forced ventilation approach on working face with gas emission.Ac- cording to the gas content of the situation,combined with other factors,gas in coal seam was drained by drilling without pressure relief.In the process of drainage, artificial methods were used to increase the permeability of coal seam coefficient measures： hydraulic fracturing and cross drilling.The amount of gas emitted from the borehole was 0. 3 m^3 / min before fracturing, and increased to 0. 44 ~ 4. 8 m^3 / min after racturing, and the increase was 0. 46 ~ 1.02 times under the same conditions.

关 键 词：瓦斯 压入式 脉动通风 水力压裂 交叉钻孔 

分 类 号：TD712[矿业工程—矿井通风与安全]