新疆巨厚煤層賦存特征與應用展望
首發時間:2018-12-28
摘要:為合理規劃開采新疆廣泛賦存的巨厚煤層,通過分析整理勘探資料和模擬實驗,明確了新疆巨厚煤層的賦存特征,研究了不同賦存條件下巨厚煤層開采覆巖結構演變過程,初步提出了以煤層傾角、煤層開采總厚和覆巖厚度為指標的巨厚煤層分類方法并進行了工程應用展望。研究結果表明:新疆巨厚煤層分布整體呈北多南少、東多西少的特點,主要集中在準東和吐哈兩大整裝煤田,其中以沙爾湖煤田C8煤層和準東煤田B組煤最具代表性,煤層平均厚70~90m,埋深600m以內,因地形變化劇烈,煤層傾角多在30 ~54 ;根據覆巖承載結構形態將巨厚煤層分為覆巖難以形成承載結構、形成梁式結構和形成拱式結構三類,并結合具體礦區實際條件進行了工程應用展望,以控制覆巖承載結構高度為核心,提出了不同煤層類別下適用的開采方法。
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Occurrence characteristics of ultra-thick coal seam in Xinjiang and its application
Abstract:In order to rationally mine ultra-thick coal seam widely distributed in xinjiang, the occurrence characteristics of ultra-thick coal seam and overlying strata structure evolution process under different occurrence conditions were studied systematically by analysis of exploration data and physical and numerical simulations. The classification method of ultra-thick coal seam was proposed preliminarily based on coal seam dip angle, total mining thickness and overburden thickness. And the prospect of engineering application was presOccurrence characteristics of ultra-thick coal seam in Xinjiang and its application prospectented. The results indicate that: 1) the distribution of ultra-thick coal seams in Xinjiang is characterized by more north and less south, more east and less west and the ultra-thick coal fields are mainly concentrated in East Junggar and Turpan-Harmi; the C8 coal seam of shaerhu coal field and the group B coal seams of East Junggar coal field are the most representative extremely thick coal seams, and average thickness of coal seam is 70 ~ 90 m, the depth is 600 m less than, dip angle of coal seam is 30 ~54 because of the terrain change drastically; 2) according to the load-bearing structure of overburden, the ultra-thick coal seam is divided into three categories: the load-bearing structure that is difficult to form, the beam structure formed and the arch structure formed; combined with the actual conditions of the mining area, the engineering application prospect was presented, with the height of overburden bearing structure as the core, the suitable mining method under different types of coal seam was put forward.
Keywords: Extra-thick coal seam Xinjiang Occurrence characteristics Classification Mining method
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