SIS well is a successful technology for coalbed methane development. In this paper, the drilling and completion technology were introduced systematically on the aspects of optimization design of well profile, drilling equipment, drilling and completion technology of vertical well and horizontal well, and intersection technique of these two wells. Two new well patterns, i.e., commingled well and boat-shape well were also proposed. When application this technology to other areas, some improvement may should be made according to special geological data.
For studying the circular mechanism and the operating mode of modern mine, this paper reviewed the current development situations of circular economy modes and some typical circular economy parks in coal mining industry at home and abroad. With the Xishan coal mine areas as the investigated objective, which operated by Xishan Coal-electricity Group in Shanxi Province of China, the characterized circular economy mode is put forwarded and concluded as “33386” development mode. Furthermore, the structure and industrial chains of Xishan circular economy system are researched in whole and interpreted in part. This is a successful attempt on the coal mining industry with a new development mode and a complete circulation of resourses in practice.
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