水力冲孔孔洞瓦斯造成掘进工作面瓦斯超限的的原因及控制措施

    Gas Overrun Reasons of Heading Face Resulting from Hole Gas of Hydraulic Punching and Control Measures

    • 摘要: 为了进一步探讨穿层钻孔水力冲孔期间与相邻的冲孔孔洞及掘进工作面间瓦斯涌出的影响,针对中马矿水力冲孔期间的瓦斯超限事故,从钻孔设计、穿层钻孔施工过程中水力冲孔的煤量及瓦斯超限过程进行了认真分析研究,摸索出在同样煤层赋存条件下,采用水力冲孔的方式增加煤体的透气性和蠕变程度时,要充分考虑冲孔煤量、孔洞范围及施工间隔时间的关系,否则,极易出现相邻的孔洞及与施工地点间瓦斯相互影响的情况。

       

      Abstract: In order to discuss how hydraulic punching process influences the neighboring punching holes and gas emission during the heading faces, the study aims at the gas overrun accident during the hydraulic punching process in Zhongma Coal Mine, the paper researches the boreholes design, the coal amount of hydraulic punching and gas overrun process during the construction. In the end, conclusion is that under the same coal seam occurrence condition, the relationship among the coal, amount of punching, hole range and construction intervals should be taken into consideration when hydraulic punching is used to increase the permeability and creep degree of the coal rock. Otherwise, the gas of neighboring holes and construction sites are vulnerable to influence each other.

       

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