瓦斯顺层钻孔抽采模拟研究
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摘要
瓦斯严重制约我国煤矿高产高效发展,而瓦斯抽采是治理瓦斯的有效途径。以山西某矿为试验矿井,基于采动覆岩裂隙发育O型圈理论,采用数值模拟软件COMSOL对顺层瓦斯抽采采空区瓦斯治理进行研究。结果表明,山西某矿72.4%的瓦斯来源于采空区;当抽采时间为1.125×10~(-5)s时,瓦斯压力最大与最小值分别为4.94×10~(-1)MPa和2.92×10~(-2)MPa,当抽采时间为1.120×10~(-5)s时,瓦斯压力最大与最小值分别为4.47×10~(-1)MPa和2.92×10~(-2)MPa,当抽采时间为1.115×10~(-5)s时,瓦斯压力最大与最小值分别为3.77×10~(-1)MPa和2.15×10~(-2)MPa,瓦斯压力曲线呈下降趋势。瓦斯顺层钻孔抽采能够有效降低该煤矿的瓦斯压力。
Gas seriously restricts the development of high yield and high efficiency in coal mines in China,and gas extraction is an effective way to control gas.Taking a certain mine in Shanxi as an experimental mine,based on the theory of O-circle development of mining overburden fractures,A numerical simulation software COMSOL was used to study the gas treatment in the goaf of gas drainage.The results show that 72.4% of the gas comes from the goaf,and when the extraction time is 1.125×10~(-5)s,the maximum and minimum values of the gas pressure are 4.94×10~(-1)MPa and 2.92×10~(-2)MPa,respectively when the extraction time is 1.120×10~(-5)s.The maximum and minimum values of gas pressure are 4.47×10~(-1)MPa and 2.92×10~(-2)MPa,respectively.When the extraction time is 1.115×10~(-5)s,the maximum and minimum values of gas pressure are 3.77×10~(-1)MPa and 2.15×10~(-2)MPa,respectively.The gas pressure in the coal mine can be effectively reduced by drilling and mining the gas along the seam.
Gas seriously restricts the development of high yield and high efficiency in coal mines in China,and gas extraction is an effective way to control gas.Taking a certain mine in Shanxi as an experimental mine,based on the theory of O-circle development of mining overburden fractures,A numerical simulation software COMSOL was used to study the gas treatment in the goaf of gas drainage.The results show that 72.4% of the gas comes from the goaf,and when the extraction time is 1.125×10~(-5)s,the maximum and minimum values of the gas pressure are 4.94×10~(-1)MPa and 2.92×10~(-2)MPa,respectively when the extraction time is 1.120×10~(-5)s.The maximum and minimum values of gas pressure are 4.47×10~(-1)MPa and 2.92×10~(-2)MPa,respectively.When the extraction time is 1.115×10~(-5)s,the maximum and minimum values of gas pressure are 3.77×10~(-1)MPa and 2.15×10~(-2)MPa,respectively.The gas pressure in the coal mine can be effectively reduced by drilling and mining the gas along the seam.
引文
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[2]熊祖强,王晓蕾.承压水上工作面破坏及裂隙演化相似模拟试验[J].地下空间与工程学报,2014,10(5):1114-1120.
[3]王晓蕾.深部巷道破碎围岩注浆加固效果综合评价[J].地下空间与工程学报,2019,15(3):675-702.
[4]熊祖强,王晓蕾.复合顶板综放面覆岩破坏及裂隙演化相似模拟试验[J].中国安全生产科学技术,2014,10(10):22-28.
[5]李强,仇海生.后高抽立眼治理初采期瓦斯的CFD模拟研究[J].煤矿安全,2018,49(9):223-228.
[6]张浩浩,等.平煤十矿底板巷穿层钻孔瓦斯抽采模拟研究[J].中国安全生产科学技术,2018,14(9):110-115.
[7]冯长红.顺层钻孔有效抽采半径的确定[J].山西能源学院学报,2018,31(4):42-44.
[8]刘怀艳,夏宁宁.顺层钻孔抽采影响范围叠加效果模拟研究[J].能源与环保,2018,40(7):30-34.
[9]王青元,等.高位顺层钻孔瓦斯抽放数值模拟[J].东北大学学报(自然科学版),2012,33(1):116-119.
[10]熊祖强,王晓蕾.深埋特厚煤层综放开采覆岩破坏与裂隙演化特征[J].东北大学学报(自然科学版),2015,36(1):10-15.