论文部分内容阅读
英国的赛尔比煤田含有10个煤层,其中5层可采.总储量约20亿吨,其中B层煤的深度为250～1200米,厚度为2～3.25米,储量为6亿吨,考虑到保护地面的煤柱后,“可收回”储量约为2.5亿吨.煤系地层向东北倾斜,斜度1:20,上部覆有二叠纪三叠纪灰岩和泥灰岩,以1:40的倾斜度向东倾斜,并呈不整合接触.三叠纪砂岩的厚度,在西部隐蔽露头处为0,到东部加大到350米,这层砂岩以及灰岩,都含水丰富.赛尔比煤田位于农业区,地面有河流、铁路、桥梁,地表沉降是矿井设计中要考虑的主要问题.设计任务书中规定,必须保证在任何时期地面沉降不得大于0.99米.所以,设计必须采取分阶段开采煤层的措施,并与地面防护工程结合起来.
The Purbi coalfield in the United Kingdom contains 10 coal seams, of which 5 are recoverable, with a total reserve of about 2 billion tonnes, of which the B-stratum has a depth of 250 to 1,200 meters, a thickness of 2 to 3.25 meters and a reserve of 600 million tonnes To protect the pillars of the ground, the “recoverable” reserves of about 250 million tons of coal strata slanting northeast slope of 1:20, the upper Permian Triassic limestone and marl covered with 1 : 40 incline to the east and there is unconformity contact.The thickness of Triassic sandstone is 0 at the hidden outcrop in the west and 350 m to the east and this sandstone and limestone are all rich in water The Erbie coalfield is located in an agricultural area with rivers, railroads, bridges and surface subsidence as the major issues to be considered in the design of the mine.The design mission statement stipulates that land subsidence must be no greater than 0.99 meters at any time, so the design must take Measures to mine the coal seam in phases and combine them with ground protection works.