A laboratory maintenance method for paste filling materials that simulates the actual stope environment
A paste filling and laboratory technology, applied in the field of paste filling and mining, can solve problems such as differences, and achieve the effect of ensuring consistency, overall stability and strength
Active Publication Date: 2020-09-11
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology
At present, the indoor curing method of filling body is mainly standard curing, but by comparing the results of field and indoor tests, it is found that the strength value of filling body measured on site is far lower than the value of indoor test, which shows that there is a gap between the on-site curing conditions and the standard curing conditions. big difference
Method used
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Embodiment 1
[0049] The metal mine adopts the open-stop mining method in sections, and uses the whole tailings paste filling method to deal with the goaf in the later stage. One of the gobs has a size of 5m (width) × 22m (length) × 26m (height). The required full tailings paste filling body is transported to the goaf by pumping through the delivery pipeline for filling;
[0050] Conduct on-site investigations on the actual stope. After the paste filling is completed, the actual stope temperature, humidity, stress on the filling body, mine water level and CO 2 Concentration is monitored in real time, and the chemical composition of mine water is detected at the same time;
[0051] During real-time monitoring, the temperature, humidity, stress on the filling body, mine water level and CO are recorded every 1 hour. 2 Concentration value, the average value of all values within 24h is used as the basis for setting the indicators of prefabricated maintenance;
[0052] Prepare the filling bod...
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The invention discloses a paste filling material laboratory curing method for simulating an actual stope environment. The method comprises: (1) carrying out on-the-spot investigation on an actual stope and carrying out real-time monitoring in the actual stope after paste filling, (2) preparing a filling body test piece in a laboratory, (3) placing the filling body test piece in a transparent container, pouring a corrosion solution into the container, then placing the container with the solution in a pressure frame, putting the pressure frame into a concrete carbonization test box, adjusting concrete carbonization test box conditions according to actual stop field monitoring values and carrying out synchronous maintenance on the filling body, (4) according to the actual stop field monitoring stress, applying stress to the filling body test piece through the pressure frame, and (5) taking out the filling body test piece after maintenance and testing mechanical properties. The mechanicalproperties detected by the method are closer to those of the filling body in the actual engineering and satisfy the actual conditions of the project.
Description
technical field [0001] The invention relates to the technical field of paste filling mining, in particular to a laboratory maintenance method for paste filling materials that simulates the actual stope environment. Background technique [0002] Paste filling mining technology is widely used at home and abroad as an important means of mining under buildings, under railways, under water bodies and above confined water (abbreviated as "three-down-up" mining). The filling paste is filled into the goaf to form an overlying rock support system mainly composed of paste filling, which can effectively control the surface mining subsidence of the goaf, improve the resource recovery rate, and ensure the sustainable development of the mine. [0003] After the paste filling is completed, real-time monitoring of the filling body under the goaf is required to ensure the filling effect. However, due to the large volume of the filling body and the complex environment underground, it is diffi...
Claims
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IPC IPC(8): G01N1/28G01D21/02
CPCG01D21/02G01N1/28
Inventor 孙琦李兵田硕蔡畅夏亚杰姚念希魏学达
Owner LIAONING TECHNICAL UNIVERSITY