CN-122014298-A - Trapezoidal roadway support structure and support method

Abstract

The disclosure relates to a trapezoid roadway support structure and a support method, wherein a point column structure for supporting is arranged at a preset position of a trapezoid roadway, and the point column structure comprises a plurality of waste stone main bodies and foam concrete filled in gaps among the waste stone main bodies. The point column structure adopts mine waste stones as main aggregate, and is matched with foam concrete cementing, so that the waste stones are recycled, the purchasing cost of supporting materials is reduced, the waste stone main body plays a role in supporting a framework, the foam concrete fills gaps and bonds the waste stones, the integral compressive strength of the point column structure is improved, the inward extrusion deformation of the trapezoid roadway edges can be effectively resisted, the roadway supporting stability is ensured, the point column structure consists of the waste stone main body and the foam concrete, a complex processing technology is not needed, the waste stones are only needed to be piled at preset positions during construction, and then the foam concrete is poured to fill the gaps, so that the construction efficiency can be greatly improved.

Inventors

• ZHANG WENQI
• CHEN JIAZHAO
• Xue Yuanhang
• Yang Shengpo
• LI SHIJIE
• LI DA
• ZHOU JIAQI
• WANG RUIJUN
• ZHANG JIANHUA
• YUAN XIAOJUN
• MENG QINGGE
• PENG KANG

Assignees

• 内蒙古金陶股份有限公司

Dates

Publication Date

20260512

Application Date

20260203

Claims (10)

1. 1. The trapezoid roadway support structure is characterized in that a point column structure for supporting is arranged at a preset position of the trapezoid roadway and comprises a plurality of waste stone main bodies and foam concrete filled in gaps among the waste stone main bodies.
2. 2. The trapezoidal roadway support structure of claim 1, wherein the predetermined location is below a highwall incline of the trapezoidal roadway.
3. 3. The trapezoidal roadway support structure according to claim 1, wherein the width of the point column structure is 0.3 m-0.8 m, and the arrangement interval between two adjacent point column structures along the trend of the ore body is 1.5 m-3.0 m.
4. 4. The trapezoidal roadway support structure of claim 1, wherein the uniaxial compressive strength of the spot post structure is 1mpa to 6mpa.
5. 5. The trapezoidal roadway support structure of claim 1, further comprising a baffle for stopping the spot post structure at a predetermined position.
6. 6. A trapezoidal roadway support method, characterized in that the support method adopts the trapezoidal roadway support structure as claimed in any one of claims 1 to 5, and the support method comprises the following steps: s1, determining the conditions of a trapezoid roadway to be supported and surrounding mine surrounding rocks; S2, determining parameters of the waste rock main body and foam concrete in the point column structure according to the conditions of the trapezoid roadway and surrounding mine surrounding rocks, and And S3, stacking the waste rock main body at a preset position of the trapezoid roadway, pouring foam concrete into the waste rock main body stack, and forming the point column structure after cementing and curing.
7. 7. The method of supporting a trapezoidal roadway as claimed in claim 6, wherein, in step S1, The step of determining the condition of the trapezoid roadway to be supported comprises measuring the bottom surface width, the top surface width and the height of the trapezoid roadway and the angle of the slope surface of the highwall of the trapezoid roadway, The surrounding rock condition determining method comprises the steps of detecting surrounding rock loose rings of the trapezoid roadway through a ground penetrating radar, and collecting joint fracture data of the surrounding rock through laser scanning.
8. 8. The method for supporting a trapezoid roadway according to claim 6, wherein the step S2 comprises the steps of determining physical and mechanical parameters of foam concrete and adaptation parameters of waste rock main bodies and foam concrete through an indoor test, and determining material proportions of the foam concrete based on the physical and mechanical parameters of the foam concrete and the adaptation parameters of the waste rock main bodies and the foam concrete.
9. 9. The trapezoidal roadway support method of claim 6, further comprising between step S2 and step S3: And S4, erecting an isolation support plate at a preset position of the trapezoid roadway, paving an anti-seepage film on the inner wall of the isolation support plate, and stacking the waste rock main body in an area surrounded by the isolation support plate.
10. 10. The method of supporting a trapezoidal roadway as claimed in claim 6, wherein, in step S3, One side of the slope surface of the side wall of the trapezoid roadway is provided with a baffle plate which is vertically arranged, and the spot column structure is arranged in an area surrounded by the baffle plate and the slope surface of the side wall.

Description

Trapezoidal roadway support structure and support method Technical Field The disclosure relates to the technical field of mining, in particular to a trapezoid roadway support structure and a support method. Background In the field of underground engineering such as mining and tunneling, a roadway is used as a core passage for personnel passing, equipment transportation and ventilation, and the support stability of the roadway is directly related to engineering construction safety and operation efficiency. With the increase of mining depth and scale and the improvement of engineering requirements under complex geological conditions, the ultra-wide roadway is widely applied. Compared with a conventional width roadway, the ultra-wide roadway has the advantages that the cross section span is large, the surrounding rock pressure born by the top plate and the two sides is obviously increased, the stress concentration phenomenon is more prominent, and the supporting difficulty is greatly improved. The trapezoid cross section is widely used in ultra-wide roadway design due to the characteristics of reasonable stress, convenient construction, strong surrounding rock deformation adaptability and the like. At present, the supporting technology for the trapezoid ultra-wide roadway mainly comprises a traditional shed type supporting technology (such as an I-shaped steel shed and a U-shaped steel shed), an anchor rod-anchor cable combined supporting technology, a sprayed concrete supporting technology, a combined supporting technology of the multiple modes and the like. However, the existing supporting technology still has a plurality of defects in practical application, namely, the traditional shed type supporting technology is high in initial supporting strength, heavy in weight and complicated in installation, poor in fitting degree with surrounding rock, difficult to effectively transfer and disperse the pressure of the surrounding rock, easy to cause risks of deformation and collapse of a shed body in long-term use, and particularly poor in stability under the condition of soft broken surrounding rock, the traditional anchor rod-anchor cable combined supporting technology is in a uniform arrangement mode, the stress distribution difference of different areas (middle part of a top plate, shoulder angles of the top plate, upper parts of the two sides and the like) of a trapezoid cross section is not fully considered, supporting strength and the stress of the surrounding rock are not matched, supporting in a critical stress concentration area is insufficient, supporting redundancy of a non-critical area is caused, supporting material waste is caused, meanwhile, the overall supporting effect cannot be guaranteed, the supporting effect is poor in synergy among supporting components of the traditional combined supporting technology, for example, the combination of a sprayed concrete layer and anchor cable is not tight, the combined supporting system cannot be formed, the cooperative bearing effect of the supporting components is difficult to fully exert, the easy to cause partial deformation of the surrounding rock is easy to occur in a strong deformation stage, the partial deformation is easy to cause, the stress is difficult to be deformed, the top plate is difficult to be deformed in a high, the overall construction cost is difficult to be controlled, the overall construction cost is difficult to be influenced, the conventional supporting system is difficult to be in high, the overall construction and the construction is difficult to be in high, and the construction and has high-quality and well-down performance conditions of the performance and has high-quality and high performance, and high performance, and low in the performance and low quality. Disclosure of Invention It is an object of the present disclosure to provide a trapezoidal roadway support structure and a supporting method to at least partially solve the problems in the related art. In order to achieve the above object, the present disclosure provides a trapezoid roadway support structure, in which a point column structure for supporting is provided at a preset position of a trapezoid roadway, the point column structure including a plurality of waste stone bodies and foam concrete filled in gaps between the plurality of waste stone bodies. In some possible embodiments, the preset position is located below a highwall inclined surface of the trapezoidal roadway. In some possible embodiments, the width of the dot column structures is 0.3 m-0.8 m, and the arrangement interval between two adjacent dot column structures along the trend of the ore body is 1.5 m-3.0 m. In some possible embodiments, the uniaxial compressive strength of the pillar structure is 1mpa to 6mpa. In some possible embodiments, the trapezoidal roadway support structure further comprises a baffle for stopping the spot post structure at a predetermined position. According to a second aspect