海孜煤矿构造变形及其对煤厚变化的控制作用
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摘要
分析了海孜煤矿岩、煤层组合特征 ,总结了 7,8,9,1 0煤层的断层、层滑构造和煤厚变化情况 ,探讨了断层与层滑构造的形成机制以及构造变形对煤厚的控制作用 .结果表明 :7,8,9,1 0煤层等软弱层属于塑性层 ,而各煤层及顶底板岩层组合及构造变形又有较大区别 .在多期构造应力场作用下 ,7,8,9煤层以层滑构造发育为主 ,形成煤层急剧增厚变薄带 ,并见压剪和张剪性两种层间断层 ;1 0煤层以中小型剪切式断层为主 ,层滑构造发育程度次之 ,煤厚变化幅度较小 .断层和层滑构造又存在密不可分的组合关系
Assemblage features of rocks and coal seams in Haizi Coal Mine were analyzed. Changes of faults, layer slip, and thickness of coal seams No.7,8,9,and 10 were summarized. Mechanism of forming faults and layer slip structure and the control of structural deformation over the thickness of coal seams were discussed. The result shows that although the weak layers such as coal seams No. 7,8,9,and 10 are plastic ones, they differs in assemblages of roof and floor and in structural deformation. Influenced by the multi phase tectonic stress fields, coal seams No. 7,8, and 9 are dominated by layer slip structures, forming sharply thickening and thinning zones and displaying inter layer faults of both compressive shear and tensional properties; While coal seam No. 10 is dominated by small to middle faults of shear property with a little development of layer slip structure and a little change of thickness of coal seam. This shows a close relationship between faults and layer slip structures.
Assemblage features of rocks and coal seams in Haizi Coal Mine were analyzed. Changes of faults, layer slip, and thickness of coal seams No.7,8,9,and 10 were summarized. Mechanism of forming faults and layer slip structure and the control of structural deformation over the thickness of coal seams were discussed. The result shows that although the weak layers such as coal seams No. 7,8,9,and 10 are plastic ones, they differs in assemblages of roof and floor and in structural deformation. Influenced by the multi phase tectonic stress fields, coal seams No. 7,8, and 9 are dominated by layer slip structures, forming sharply thickening and thinning zones and displaying inter layer faults of both compressive shear and tensional properties; While coal seam No. 10 is dominated by small to middle faults of shear property with a little development of layer slip structure and a little change of thickness of coal seam. This shows a close relationship between faults and layer slip structures.
引文
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[2] RamsayJG.岩石韧性及其对山带中构造发育的影响[J].李智陵译.基础地质译丛,1985(2):49-60.
[3] 王桂梁,曹代勇,姜 波,等.华北南部的逆冲推覆伸展滑覆与重力滑动构造——兼论滑脱构造的研究方法[M].徐州:中国矿业大学出版社,1992.
[4] 龙荣生.矿井地质学[M].北京:煤炭工业出版社,1993.
[5] 琚宜文.海孜煤矿煤层断裂及层滑构造研究[D].徐州:中国矿业大学地质系,1994.
[6] 王桂梁,徐凤银,龙荣生,等.矿井构造预测[M].北京:煤炭工业出版社,1993.28-143.
[7] AxenG J.The geometry of planar domino-stylenormal faults above a dipping basal detachment[J].Journal ofStructuralGeology,1988,10(4):405-411.
[8] 朱志澄,宋鸿林.构造地质学[M].武汉:中国地质大学出版社,1990.
[9] RamsayJG.Folding and fracturing of rocks[M].NewYork:McGrawHill,1967.
[10] 王桂梁,刘登桃,姜 波,等.福建天湖山区推滑叠加型滑脱构造模式[J].中国科学(B辑),1995,25(1):85-92.
[11] 高凌蔚.豫西云盖山地区二1煤层构造变形及煤厚变化规律[M].北京:地震出版社,1986.
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