松软煤层含气量研究——以平顶山矿区首山一矿为例

Research on the Gas Content of Soft Coal Seam-A Case Study of Shoushan No.1 Coal Mine in Pingdingshan Area

本文以平顶山矿区首山一矿为例,根据Langmuir方程和排采过程中实测的临界解吸压力计算了四_2煤层含气量。结果显示:四_2煤层含气量为6.42~7.45m^3/t,平均为6.94m^3/t,是煤层含气量测试结果的1.15~1.34倍,平均为1.26倍;同时,运用运移理论探讨了煤层含气量测试结果失准的原因,认为由于松软煤层煤体抗压、抗拉强度小和取心过程中钻具对煤心碰撞、切削作用等客观因素的存在,造成了松软煤层含气量测试结果的失准。考虑上述因素,笔者认为应对松软煤层含气量测试结果进行科学、合理地校正。

To accurately obtain the gas content of soft coal seam, the Shoushan No. t coal mine in Pingdingshan area. Making use of the paper conducts a case study of the Langmuir equation and critical desorption pressure in draining process, the gas content of the IV2 coal seam is calculated. The result indi- cates that gas content of the IV2 coal seam is 6. 42 -7.45m3/t, with an average of 6. 94m3/t. It is 1.15 1.34 times as large as the test result of coal seam gas content in these area, with an average of 1.26 times. Meanwhile, the reason for inaccurate testing result of gas content has been discussed by using the migration theory. Because of the objective factors that the low compressive strength and tensile strength of soft coal seam, collision and cutting action in coal coring process, the testing result of coal seam gas con- tent is inaccurate. Considering above factors, It is suggested that the testing result of gas content of soft coal seam should be scientifically and legitimately corrected.