A test method for strength distribution law of backfill stope filling body
A technology of strength distribution and testing method, which is applied in the direction of filling, applying stable tension/pressure to test material strength, mining equipment, etc. It can solve problems such as errors, affecting accuracy, filling body core damage, etc., and achieve high accuracy , Simple design, small error effect
Inactive Publication Date: 2018-06-22
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, since the strength of the filling body is seriously affected by water, and the geological drilling mostly adopts wet rock drilling method to drill the filling body core, and the drilling tool will cause certain damage to the filling body core during the drilling process, resulting in the test There is a large error between the sample strength value and the actual value, which affects the accuracy of the research on the strength distribution law of the stope filling body
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Embodiment 1
[0049] Step 1: Build a cuboid slurry tank 3 with an open top, 3.0m in length, 1.0m in width, and 1.0m in height. One side of the length direction is provided with a feeding funnel 1, and the other side uses geotextile and 7 steel mesh 8 to construct a water filter retaining wall. The geotextile is on the inside and the steel mesh is on the outside. 50mm, and the rest of the panels are constructed of steel plates with a thickness of 5cm.
[0050] Step 2: Place 36 sets of triple molds 2 coated with engine oil in the slurry tank 3. The triple molds 36 are placed in 9 columns in the length direction of the slurry tank 3 to form a row. The 9 columns are centered in the slurry tank (the leftmost The distance between the side column and the rightmost column is equal to the slurry tank 3), and the spacing between each column is 30cm; 4 layers are placed in the height direction, and each layer is located at 1 / 3 of the height of the slurry tank from bottom to top along the height direct...
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Abstract
The invention relates to a method for testing the strength distribution rule of filling bodies in the stope adopting subsequent filling and belongs to the technical field of mine filling theories and techniques. The method comprises the following steps: a cuboid slurry tank is constructed, a plurality of triple molds are uniformly placed for manufacturing of experimental samples, and filling slurry is prepared in the cement-tailing ratio and the mass concentration which are the same with those in the stope and injected into the slurry tank through a discharging hopper at the calculated flow velocity and the calculated flow rate. The samples in the triple molds are taken out, numbered and put into a high-low-temperature curing box to be cured, the samples are tested, and the relation curve between the filling body strength and the length in the flowing direction of the slurry is drawn according to the positions of the samples in the slurry tank. The filled stope cannot be damaged, the error between a tested strength result and a practical strength value is small, repeated testing and verification are facilitated, the strength distribution rule of the filling bodies in the stope can be accurately reflected, and research on the filling bodies in the stope is facilitated.
Description
technical field [0001] The invention relates to a method for testing the strength distribution law of a filling body in a subsequent filling stope, belonging to the field of mine filling theory and technology. Background technique [0002] The strength of mine filling body is an important mechanical parameter of filling body and one of the important indicators for quality evaluation of stope filling body. However, the filling slurry is prone to segregation and delamination during the flow process of the subsequent filling stope, resulting in obvious inhomogeneity in the strength distribution of the filling body, which seriously affects the quality of the filling body and threatens the production safety of the stope. At present, geological drilling is generally used in China to drill filling body cores at different positions in the filled stope according to a certain curing age, and test samples are made according to the height-to-diameter ratio of 2:1, and a press with a ran...
Claims
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IPC IPC(8): G01N3/12E21F15/00
CPCE21F15/00G01N3/12
Inventor 刘志义甘德清孙光华李占金薛振林李示波卢宏建张亚宾张友志申梦飞
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY