The origin analysis and countermeasures for weak abnormal oil& gas shows in Nanxiang Basin

Numerical modeling of gas extraction by relief pressure from a long-distance

远程卸压瓦斯抽放数值模拟

Drilling Hole Design Improvement of Gas Suction of Cross-measure Cutting Coal

石门揭煤瓦斯抽放钻孔设计方法的改进

Applied Study on Deep Hole Standing Shot to Improve Methane Drainage Efficiency

深孔松动爆破提高瓦斯抽放率的应用研究

Determination of Rational Sealing length of Gas Drainage Holes and the Practice

瓦斯抽放钻孔封孔长度的确定与实践

Gas extraction methods and optimization principles in Yangquan Mining Area

阳泉矿区瓦斯抽放方式及优选原则

Type WB-60 Vacuum Pump for Methane Drainage

WB-60型瓦斯抽放真空泵

Theory and practices on high level borehole gas drainage technology

高位钻孔瓦斯抽放技术理论与实践

Application of directional split blasting on gas taking out in coal mine

定向致裂爆破法在煤矿瓦斯抽放中的应用研究

CMM drainage and utilization to improve coal mine safety in China

促进煤矿瓦斯抽放利用确保煤矿安全

MK series drilling rig and application in mine gas drainage

MK系列钻机及其在煤矿瓦斯抽放中的应用

Research on improving gas drainage under suction in mining working face

提高回采工作面瓦斯抽放率的途径

VLD directional drilling rig applied to mine gas drainage in Daning Mine

VLD型定向钻机在大宁矿瓦斯抽放中的应用

Gas Drainage by Boring Near Seam at 43001 Coal Face

43001采煤工作面上邻近层穿层钻孔瓦斯抽放

Calculation of gas drainage parameters for Qi Chi coal seam in Yangquan

阳泉七尺煤层瓦斯抽放参数计算

Scale That the Gas Takes Out Putting in a Pump is Handled

瓦斯抽放泵的水垢处理

The structure mode, function, main instrument and feature of gas monitoring systems with GPRS for to take out and give out the gas are introduced.

介绍了应用GPRS的煤矿瓦斯抽放监测系统的组成方式、功能、主要设备、特点。

Enhance Gas Drainage and Utilization to Promote Work Safety of Coal Mines

搞好瓦斯抽放利用促进煤矿安全生产

Gas Monitoring System with GPRS for Coal Mine

GPRS煤矿瓦斯抽放监测系统

Elementary Analysis of Surface Borehole Stability in Gob Area Methane Drainage

地面采空区瓦斯抽放钻孔稳定性分析

Construction technique of foam method for drilling long gas extraction hole

泡沫法施工瓦斯抽放长孔工艺