Method for underground tunnel drilling construction and geological information inversing
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An underground roadway and geological technology, which is applied in earthwork drilling, wellbore/well components, mining equipment, etc., can solve the problems of insufficient forecasting function, low forecasting ability of geological technology, limited reference role of design and construction units, etc., to achieve guarantee The effect of construction safety
Active Publication Date: 2013-07-03
HUAINAN MINING IND GRP +1
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At present, blind drilling is usually used for drilling, and the actual situation of the coal seam in front is unknown. Usually, abnormal geological structures and other abnormalities will be encountered during the drilling construction process. At present, the borehole design is expressed in the form of a flat section, and the information of multiple groups of boreholes is crossed during control, which has limited reference to the design and construction units, and the geological information revealed by the boreholes has insufficient prediction function for the geological structure and its anomalies. Low predictive power of geological techniques
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Embodiment 1
[0019] figure 1 A schematic cross-sectional view of the bedding roadway drilling provided by the embodiment of the present invention; figure 2 for figure 1 Sectional view along A-A direction; image 3 for figure 1 Sectional view along B-B direction; Figure 4 is a three-dimensional schematic diagram of the amended bedding roadway; Figure 1-4 As shown, the embodiment of the present invention provides an underground roadway drilling construction and geological information inversion method, including the following steps:
[0020] Step 1), establish a coal seam geological model 1 according to the predicted value in the three-dimensional coordinate system;
[0021] Step 2), pre-setting the bedding roadway 2 and at least one row of boreholes 3 in the three-dimensional coordinate system;
[0022] Step 3), drilling according to the above preset conditions, and obtaining a series of geological information during the drilling process;
[0023] Step 4), inverting and correcting ...
Embodiment 2
[0036] On the basis of Example 1, as Figure 5 , Figure 6 As shown, the following steps are also included between step 1) and step 2):
[0037] Step 11), predicting the orientation of the roadway 4 in the coal seam geological model 1;
[0038] Step 12), arranging the position of the borehole 6 in the construction roadway 5 above or below the coal seam working face;
[0039] Step 13), setting the orientation of drilling 7 in the high-drawing roadway or drilling 8 in the bottom-drawing roadway;
[0040] Step 14), carry out high-drawing roadway drilling 7 or bottom-drawing roadway drilling 8 according to the predetermined azimuth.
[0041] As a preferred implementation of the above-mentioned embodiment, the boreholes of the high extraction roadway or the bottom extraction roadway are distributed within a width range of about 15 meters on both sides of the preset coal seam roadway, preferably 0-15 meters. The gas in this range is released by drilling, which can satisfy the sa...
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Abstract
The invention provides a method for underground tunnel drilling construction and geological information inversing. The method comprises the steps as follows: establishing a coal bed geological model in a three-dimensional coordinate system according to a predication value; arranging a bedding tunnel and at least one row of drilling holes in the three-dimensional coordinate system in advance; drilling according to the pre-arranged drilling holes, and acquiring a series of geological information during drilling; inversing and correcting the coal bed geological model in the three-dimensional coordinate system according to the geological information; correcting walking directions of the bedding tunnel and the drilling holes in the three-dimensional coordinate system according to the corrected coal bed geological model; and excavating tunnels and performing drilling construction in the next turn according to the corrected geological model. By means of a three-dimensional design of the underground construction drilling holes, the actual geological information of the drilling holes are recorded, the actual space distribution pattern of each drilling coal layer is inversed, a stratum is reconstructed according to information of the position and the thickness of a coal layer, division of a rock stratum and the like, and abnormal geological structures of a fault and the like are forecasted, so that the guidance for safety production of tunnel excavation is provided, and the structural anomaly position is treated preliminarily to guarantee construction safety.
Description
technical field [0001] The invention relates to underground mining technology, in particular to an underground roadway drilling construction and geological information inversion method. Background technique [0002] There are many types of drainage and exploration drilling in coal mine underground roadway, mainly for coal seam gas drainage, geological structure exploration, water discharge and other functions. At present, blind drilling is usually used for drilling, and the actual situation of the coal seam in front is unknown. Usually, abnormal geological structures and other abnormalities will be encountered during the drilling construction process. At present, the borehole design is expressed in the form of a flat section, and the information of multiple groups of boreholes is crossed during control, which has limited reference to the design and construction units, and the geological information revealed by the boreholes has insufficient prediction function for the geolog...
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