煤巷掘进水力掏槽防治煤与瓦斯突出技术

通过理论研究和工业试验，确定了水力掏槽新掘进防突措施，并提出了适合焦作矿区的防突措施参数，系统评价了水力掏槽防突措施的有效性、适应性和安全性.研究结果表明：水力掏槽防突措施是高压水通过水枪产生高流量的稳定射流破碎前方煤体形成槽硐，槽硐周围煤体得到充分卸压，释放出大量瓦斯，煤体物理力学性质发生改变.当卸压槽具有足够面积时，在巷道周围形成卸压和排放瓦斯的煤带，解除突出危险性.2 000 m严重突出地区巷道掘进表明：正常掘进期间未发生一次突出，巷道安全掘进速度提高2倍以上.

Hydraulic slotting technology to prevent coal and gas outburst during heading excavation

The technology of measures to prevent coal and gas outburst was analyzed in serious outburst coal seam under research and experiment with real situation.A new measure,called hydraulic slotting,was described and studied in detail,and the mechanism of hydraulic slotting was put forward and analyzed.The characteristic parameter of hydraulic slotting was given in Jiaozuo mining area and the characteristic of validity,adaptability and security was evaluated.The research results show that,while slotting heading by high pressure large diameter jet,not only the stress surrounding the strata but also the gas in coal seam is released efficiently and thoroughly after the new measure was taken.The resistance to coal and gas outbursts was increased dramatically at once if the area of slot was big enough.The experimentation succeeded in 2 000 m heading excavation,and coal and gas outburst didn't happen.The measure had a potential effect to prevent and control coal and gas outburst during heading excavation,and the heading driving speed was increased more than 2 times.