主井侧帮探(国外英文资料).doc

主井侧帮探(国外英文资料) Main well Transient electromagnetic method test report Test unit: horseshoe coal mine biotech Time: August 10, 2014 1. Introduction From the main shaft changing slope above about 130 meters, the contralateral help every 5 meters with basic line 3, (30 degrees oblique upward direction, bedding direction 0 degrees, inclined down to 30 degrees direction), the geophysical exploration. Prospecting missions and objectives: 1) detecting the anomaly and distribution of the low resistance of the main well. 2) analysis of water structure and hydraulic connection in the area. To provide the basis for the physical exploration of coal seam exploitation or water damage control in the area. 4) provide the basis for the design of waterproof drilling. Address -- physical features of the earth The electrical distribution of different strata is analyzed from the electrical properties: the resistivity of coal bed is relatively high, the sandstone second is the lowest, and the clay rock is the lowest. Because the sedimentary sequence of strata is clear, in the condition of original formation, its electrical conductivity characteristics on the longitudinal fixed, and on the transverse is relatively uniform. When there is a broken belt, if the structure is not hydrated, the conductivity is poor, and the local resistivity value increases. If water is constructed, it is the equivalent of a local low resistivity of the mass. To sum up, when the fault, fracture and collapse column of geological structure development, regardless of its water or not, will break the formation electrical in vertical and horizontal change rules. The existence of this change law provides good geological conditions for the detection of transient electromagnetic method of mine in the coal mine, which is based on the rock conductivity difference. Basic theory of transient electromagnetic method of mine Mine transient electromagnetic and ground is the same as the basic principle of transient electromagne