崔家沟煤矿采空区瓦斯抽采效果评价模型

(1.西安科技大学 安全科学与工程学院,陕西 西安 710054; 2.西安科技大学 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054; 3.陕西省崔家沟煤矿,陕西 铜川 7272000)

采空区; 层次分析法; 指标体系; 模糊综合评价

Evaluation model of gas drainage effect in goaf of Cuijiagou coal mine
LI Shu-gang1,2,CHENG Hao1,,PAN Hong-yu1,2,SONG Shuang1,HAN Ya-wei3

(1.College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China; 3.Cuijiagou Coal Mine,Shaanxi Province,Tongchuan 727000,China)

goaf; analytic hierarchy process; indicator system; fuzzy comprehensive evaluation

备注

安全高效的瓦斯抽采效果评价对于矿井瓦斯抽采有着至关重要的作用。为评价崔家沟煤矿采空区瓦斯抽采效果,通过资料收集,建立崔家沟煤矿采空区瓦斯抽采效果评价指标体系。其中一级指标包括煤层、工作面、瓦斯抽采系统等5项指标。二级指标包括高位钻孔法、定向长钻孔法和上隅角插管法3项指标。运用层次分析法计算权重,并结合模糊综合评价建立崔家沟煤矿采空区瓦斯抽采效果评价数学模型,对崔家沟煤矿进行综合评价。结果 表明:通过分析筛选崔家沟煤矿采空区瓦斯抽采效果影响因素,建立的三级评价指标体系是合理的; 在层次分析法确立权重过程中,瓦斯抽采方法所占权重最大,为0.43,表明在崔家沟煤矿采空区瓦斯抽采过程中,瓦斯抽采方法的选择十分重要,与现场实际相吻合; 层次分析法和模糊综合评价相结合的评价方法可以应用于瓦斯抽采效果评价,并且评价结果良好,为我国采空区瓦斯抽采效果评价提供了新方法。

The evaluation of safe and efficient gas drainage effects is of crucial importance for mine gas drainage.To evaluate the gas extraction in the coal-mining goaf of Cuijiagou,an evaluation index system for the gas drainage effect there was established by the help of data.The first-level involve five indicators,such as coal seam,working face and gas extraction method,etc.The secondary impact factor elements include three indicators,such as the high drilling method,the directional long drilling method and the upper corner intubation method.The analytic hierarchy process was employed to compute weights.Combined with fuzzy comprehensive evaluation,a mathematical model of assessing the gas extraction outcome in Cuijiagou coal-mining goaf was constructed to synthetically evaluate the coal-mining in Cuijiagou.The results confirm the validity of established three-level index evaluation system by analyzing and screening the factors influencing the gas drainage effect in the coal-mining goaf of Cuijiagou.During the determination of weights by analytic hierarchy process,gas extraction is accounted for the biggest weight,0.43.Its domination demonstrates the important role of method selection in the gas extraction in the coal-mining goaf of Cuijiagou,consistent with the practical situation.The assessment that combines analytic hierarchy process with fuzzy comprehensive evaluation is available for gas drainage effect evaluation,resulting in a better situation.Meanwhile,this combined assessment introduces a new way to assess the gas extraction in goaf in China.