云南矿区薄煤层瓦斯压力的准确测定

Accurate measurement of gas pressure in thin coal seam in Yunnan mining area

云南矿区地质条件复杂,岩层的孔裂隙相对发育,开采煤层多为薄煤层或者是极薄煤层,严重影响了煤层瓦斯压力的准确测定。为了准确测定煤层瓦斯压力,在分析影响薄煤层瓦斯测定因素的基础上,提出了新型多次注浆封堵一体化技术。选择昌能煤矿作为试验矿井,现场应用新型多次注浆封堵一体化技术,得到了采用新型封孔技术的1~#、3~#钻孔测定的煤层瓦斯压力为0.36 MPa和0.34 MPa,结合矿井在采动过程中瓦斯涌出情况来看,该数值更为接近矿井真实煤层瓦斯压力值,验证了新型多次注浆封堵一体化技术相比于传统测压方法是准确可靠的。

Yunnan mining area had complex geological conditions and relatively developed pores and fissures of rock strata, the coal seams were mostly thin coal seams or extremely thin coal seams that seriously affected the accurate measurement of gas pressure in coal seams. In order to measure the gas pressure accurately, a new integrated technology of multiple grouting and plugging was put forward on the basis of analyzing the factors affecting the gas measurement of thin coal seam. Taking Changneng Coal Mine as the test mine, and the new integrated technology of multiple grouting and plugging was applied in the field and the coal seam gas pressures measured by No.1 and No. 3 boreholes using new hole sealing technology were 0.36 MPa and 0.34 MPa respectively. Combined with the gas emission situation in the mining process, the value was closer to the real coal seam gas pressure value, which verified that the new integration technology of multiple grouting and plugging was more accurate and reliable than the traditional pressure measurement method.