Coal seam floor water disaster treatment scheme determination method and related product

Abstract

The invention provides a coal seam floor water disaster treatment scheme determination method and related products, and relates to the technical field of mine water disaster prevention and control. The method comprises the steps of determining a target aquifer with a water inrush risk based on the influence degree of each aquifer of a coal seam floor on mining safety and the influence degree of mining on each aquifer of the coal seam floor; determining the type of the target aquifer based on the hydrological parameters of the target aquifer; and on the basis of the type of the target aquifer, the treatment mode of the target aquifer is determined as drainage depressurization transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of a water-resisting layer. According to the method, a systematic scheme determination method is formed from evaluation and determination of the aquifer with the water inrush risk to giving of the targeted water disaster treatment scheme based on the hydrological parameters of the aquifer. Meanwhile, due to the fact that the influence of the aquifer on mining and the influence of mining on the aquifer are considered, the mining safety is guaranteed, and the economical efficiency is considered by introducing the classified treatment modes such as drainage and pressure reduction transformation.

Description

Technical Field

[0001] The present invention relates to the technical field of mine water hazard prevention and control, and in particular to a method for determining a coal seam floor water hazard control plan and related products. Background Art

[0002] Water inrush from the coal seam floor is one of the common forms of water hazards in mines. Especially when the mining depth gradually increases, the thickness of the floor relative to the impermeable layer decreases, hidden structures of the coal seam floor develop, and there are composite aquifers, the phenomenon of pressurized water inrush from the floor causing flooding and hindering safe production becomes more and more serious.

[0003] At present, grouting transformation of the floor aquifer is the main effective means of preventing and controlling floor water hazards. It mainly adopts ground directional drilling, conventional underground drilling and underground directional drilling and other hole-forming methods to drill holes, and then completes the transformation of the floor aquifer or geological structure through grouting technology. Although the grouting transformation of the floor aquifer can effectively prevent and control water hazards and ensure the safety of mining, its construction period is long and the cost is high, so it cannot take into account safety and economy well. Moreover, the current water hazard prevention and control scheme lacks systematicity. Therefore, designing a systematic water hazard prevention and control scheme that can take into account both mining safety and economy has become an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a method for determining a coal seam floor water hazard control plan and related products, which are used to solve the defect that water hazard control in the prior art cannot take into account both safety and economy, and achieve safe and economical control of coal seam floor water hazard problems.

[0005] The present invention provides a method for determining a coal seam floor water hazard control plan, comprising the following steps.

[0006] Based on the impact of each aquifer in the coal seam floor on mining safety and the impact of mining on each aquifer in the coal seam floor, determine the target aquifer with water inrush risk; Determining the type of the target aquifer based on the hydrological parameters of the target aquifer; Based on the type of the target aquifer, the treatment method of the target aquifer is determined as hydrophobic and pressure-reducing transformation, local grouting transformation, regional grouting transformation or grouting to reinforce the aquifer.

[0007] According to a method for determining a coal seam floor water hazard treatment scheme provided by the present invention, based on the type of the target aquifer, the treatment method of the target aquifer is determined as drainage and pressure reduction transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer, including: Determine whether the target aquifer belongs to the first type; the first type is a weakly water-rich aquifer, or an aquifer with medium water-richness, a permeability coefficient lower than a first set value, a thickness less than a second set value, and a local geophysical low-resistance anomaly zone; If the type of the target aquifer belongs to the first type, the treatment method of the target aquifer is determined to be hydrophobic and pressure-reducing transformation; Determine whether the target aquifer belongs to the second type, the second type being an aquifer with medium water richness, a thickness less than a second set value, and having a local geophysical low-resistance anomaly area; If the type of the target aquifer belongs to the second type, the treatment method of the target aquifer is determined to be water-draining and pressure-reducing transformation or local grouting transformation; Determining whether the target aquifer belongs to the third type, wherein the third type is an aquifer with strong water-richness and a thickness less than a second set value; If the type of the target aquifer belongs to the third type, the treatment method of the target aquifer is determined to be grouting to reinforce the aquiclude or regional grouting transformation; Determining whether the target aquifer belongs to a fourth type, where the fourth type is an aquifer with a thickness greater than or equal to a second set value; If the type of the target aquifer belongs to the fourth type, the treatment method of the target aquifer is determined to be regional grouting transformation.

[0008] According to a method for determining a coal seam floor water hazard control scheme provided by the present invention, before determining a target aquifer with a risk of water inrush, the method further includes: Determine the scope of the mining damage depth of the coal seam floor and the water-conducting channel connecting the aquifer formed by the mining stress; Based on the affected range and the water conducting channel, the impact degree of mining on each aquifer in the coal seam floor is determined.

[0009] A method for determining a coal seam floor water hazard control scheme according to the present invention also includes: Based on the proximity between the treatment time and the excavation and mining time, the composition ratio of the slurry in the grouting transformation is determined.

[0010] According to a method for determining a coal seam floor water hazard treatment plan provided by the present invention, the composition ratio of slurry in grouting transformation is determined based on the proximity between the treatment time and the excavation and mining time, including: Determine whether the time interval between the treatment time and the excavation and mining time is less than a third set value; If the time interval between the treatment time and the excavation and mining time is less than the third set value, the proportion of cement in the slurry is increased; If the time interval between the treatment time and the excavation and mining time is greater than or equal to the third set value, the proportion of the cement component in the slurry is reduced.

[0011] A method for determining a coal seam floor water hazard control scheme according to the present invention also includes: Determine whether the thickness of the target aquifer is less than a second set value, whether there is an adjacent aquifer below, and whether the treatment methods of the target aquifer and the adjacent aquifer below are both regional grouting transformation; If the thickness of the target aquifer is less than the second set value, and there is an adjacent aquifer below, and the treatment methods for the target aquifer and the adjacent lower aquifer are both regional grouting transformation, then the proportion of cement components in the grouting transformation slurry of the target aquifer is increased, and the proportion of cement components in the grouting transformation slurry of the adjacent lower aquifer is reduced.

[0012] According to a method for determining a coal seam floor water hazard control plan provided by the present invention, the regional grouting transformation is carried out by ground construction; the drainage and pressure reduction transformation and local grouting transformation are carried out by underground construction.

[0013] A method for determining a coal seam floor water hazard control scheme according to the present invention also includes: Determine whether the treatment method of the target aquifer is hydrophobic pressure reduction transformation and the thickness is less than a second set value; If the treatment method of the target aquifer is hydrophobic and pressure-reducing transformation and the thickness is less than the second set value, conventional downhole drilling is selected as the drilling method; Determining whether the treatment method of the target aquifer is local grouting transformation, and whether the thickness is less than a second set value; If the treatment method of the target aquifer is local grouting transformation and the thickness is less than the second set value, the drilling method is selected as downhole conventional drilling or downhole directional drilling; Determine whether the treatment method of the target aquifer is regional grouting transformation, and whether the thickness is less than a second set value; If the treatment method of the target aquifer is regional grouting transformation and the thickness is less than the second set value, the drilling method is selected as downhole directional drilling or ground directional drilling; Determining whether the thickness of the target aquifer is greater than or equal to a second set value; If the thickness of the target aquifer is greater than or equal to the second set value, the drilling method is ground directional drilling.

[0014] The present invention also provides a device for determining a coal seam floor water hazard control plan, comprising: The risk aquifer determination module is used to determine the target aquifer with water inrush risk based on the degree of influence of each aquifer in the coal seam floor on mining safety and the degree of influence of mining on each aquifer in the coal seam floor.

[0015] The aquifer type determination module is used to determine the type of the target aquifer based on the hydrological parameters of the target aquifer.

[0016] The treatment method determination module is used to determine the treatment method of the target aquifer as hydrophobic pressure reduction transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer based on the type of the target aquifer.

[0017] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for determining a coal seam floor water hazard control plan as described in any one of the above-mentioned methods is implemented.

[0018] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for determining a coal seam floor water hazard control solution as described in any one of the above.

[0019] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned methods for determining a coal seam floor water hazard control plan.

[0020] The method for determining the coal seam floor water hazard treatment plan and related products provided by the present invention determine the target aquifer with water inrush risk by comprehensively evaluating the degree of influence of the aquifer on mining safety and the degree of influence of mining on each aquifer on the coal seam floor, and then classify and treat the target aquifer based on the hydrological parameters of the target aquifer, and determine the treatment method as one or more of water-draining and pressure-reducing transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer. The present invention forms a set of systematic scheme determination methods from the evaluation and determination of aquifers with water inrush risks to the provision of targeted water hazard treatment plans based on the hydrological parameters of the aquifers. Since the influence of aquifers on coal seam mining and the influence of coal seam mining on aquifers are taken into consideration, the safety of coal seam mining is guaranteed. At the same time, the introduction of classified treatment methods such as water-draining and pressure-reducing transformation takes into account economy. That is, the method for determining the coal seam floor water hazard treatment plan provided by the present invention is a systematic method that takes into account mining safety and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is one of the flow charts of the method for determining a coal seam floor water hazard control solution provided by an embodiment of the present invention.

[0023] Figure 2 This is the second flow chart of the method for determining a coal seam floor water hazard control solution provided by an embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the combined arrangement of conventional underground drilling and ground directional drilling provided by an embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of a directional drilling arrangement method provided in an embodiment of the present invention.

[0026] Figure 5 It is a structural schematic diagram of a device for determining a coal seam floor water hazard control solution provided by an embodiment of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] First, the professional terms involved in this article are explained.

[0030] (1) Directional drilling The drilling is carried out according to the pre-designed azimuth, well inclination, axial shape of the wellbore and a certain forward direction to reach the target location.

[0031] (2) Floor water damage It refers to the phenomenon that water from the aquifer in the bottom plate of the underground space seeps and gushes into the tunnels or goafs through the lifting channels, which has affected the normal production of the mine and endangered safety.

[0032] (3) Water inrush from the coal seam floor The phenomenon in which the pressurized water in the coal seam floor overcomes the rock strength of the relative impermeable layer between the coal seam and the karst aquifer and the resistance of structural surfaces such as joints and faults under the influence of factors such as water pressure and mine pressure, and suddenly rushes into the tunnel or mining area through the water-conducting channel formed by the failure surface formed in the floor rock mass is called floor water inrush.

[0033] (4) Lithological structure During the stratigraphic sedimentation process, different lithological strata such as mudstone, sandstone, coal seam, limestone, etc. are deposited in layers. There are differences in rock strength, permeability, degree of fracture development, etc. of different lithologies, which reflects the geological structure model of the lithological sequence characteristics.

[0034] Combine the following Figure 1-Figure 4 The present invention describes a method for determining a coal seam floor water hazard control solution.

[0035] Figure 1 FIG. 1 is one of the flow charts of the method for determining a coal seam floor water hazard control solution provided by an embodiment of the present invention, such as Figure 1 As shown, the method comprises the following steps: Step 101: Determine a target aquifer with a risk of water inrush based on the degree of influence of each aquifer in the coal seam floor on mining safety and the degree of influence of mining on each aquifer in the coal seam floor.

[0036] Step 102: Determine the type of the target aquifer based on the hydrological parameters of the target aquifer.

[0037] Step 103: Based on the type of the target aquifer, the treatment method of the target aquifer is determined as hydrophobic and pressure-reducing transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer.

[0038] The method for determining a coal seam floor water hazard control scheme provided by the embodiment of the present invention provides a set of systematic methods for determining a coal seam floor water hazard control scheme, from determining the target aquifer to determining the targeted control method for the target aquifer. In addition, a comprehensive evaluation is made from aspects such as the impact of the coal seam floor aquifer on coal seam mining and the impact of coal seam mining on the coal seam floor aquifer to determine the target aquifer with a high risk of water inrush, thereby ensuring the safety of coal seam mining. At the same time, water hazard control methods such as drainage and pressure reduction transformation are introduced for classified control, which reduces costs to a certain extent and takes into account the economic efficiency of coal seam mining.

[0039] Furthermore, at present, the management of bottom plate water hazards has gradually changed from conventional underground drilling and grouting to ground directional long horizontal hole grouting, mainly for grouting management of Ordovician limestone aquifers that endanger the safety of mining. The ground area management project mainly carries out directional horizontal grouting drilling construction in the selected thick Ordovician limestone aquifers with large thickness, but the thin layer of limestone still has the threat of bottom plate water inrush, so the existing water hazard management scheme has failed to completely eliminate the threat of bottom plate water inrush. The present invention is based on the bottom plate water hazard management idea of ​​comprehensive evaluation and classified construction, which not only solves the threat of water inrush of thin aquifers (thin layers of limestone) that is not considered in the existing technology, but also takes into account safety and economy. The comprehensive evaluation, classified construction and solution to the risk of water inrush of thin aquifers (thin layers of limestone) mentioned above will be introduced in detail later.

[0040] The comprehensive evaluation described above is presented below together with the solution to the risk of water inrush in thin aquifers (thin limestone).

[0041] Figure 2 FIG. 2 is a flow chart of a method for determining a coal seam floor water hazard control solution according to an embodiment of the present invention. Figure 2 As shown, in an embodiment of the present invention, an aquifer with a risk of water inrush is determined based on the impact evaluation of the coal seam floor aquifer on coal seam mining and the impact evaluation of coal seam mining on the coal seam floor aquifer. Among them, the impact evaluation of the coal seam floor aquifer on coal seam mining is: through the analysis of the hydrogeological and engineering geological conditions of the treatment area, the mining depth, mining thickness, floor lithology structure, aquifer hydrological parameters (water pressure (used to calculate the water inrush coefficient), water richness, permeability, etc.) and the thickness of the aquiclude relative to the coal seam floor. The low-resistance abnormal areas of each aquifer in the coal seam floor are determined by ground geophysical exploration, and the degree of influence of the relevant aquifer on coal seam mining is comprehensively judged through hydrogeological exploration data and other relevant data, so that the aquifer that affects the safety of mining can be determined. The impact of coal seam mining on the coal seam floor aquifer is evaluated by determining the water inrush coefficient of the coal seam floor aquifer and the critical aquiclude thickness of the coal seam floor through the water inrush coefficient method, determining the coal seam floor mining damage depth through the empirical formula method, the actual measurement method or the numerical method, and judging whether the floor mining damage depth affects the relevant aquifers, and analyzing whether the water conduit formed by the activation of the geological structure caused by the mining stress communicates with the aquifer. That is, the aquifer affected by mining is determined based on the aquifer affected by the damage depth and the aquifer communicated by the water conduit. In summary, the aquifer that affects the safety of mining, the aquifer affected by the damage depth, and the aquifer communicated by the above-mentioned water conduit are all the target aquifers described in the present invention.

[0042] Specifically, the coal seam mining depth H and coal seam mining thickness M are determined by using the ground drilling exposure method or the formation elevation subtraction method. The aquifers in the coal seam floor are numbered as the i-th aquifer (i=1, 2, 3...) through the hydrogeological exploration data, and the lithology and structure characteristics of the floor are determined, specifically the lithology and thickness m of the coal seam floor aquifer and aquifer. i (i=1, 2, 3...), where the water pressure, permeability and water richness of the aquifer are used to draw conclusions on the hydrological conditions.

[0043] Through ground geophysical exploration methods, mainly transient electromagnetic method, the low-resistance abnormal area of ​​the coal seam floor aquifer is delineated, and the spatial overlapping relationship of the low-resistance abnormal area is analyzed to determine the probability of vertical hydraulic connection. The hydrological conditions of the aquifer are combined to comprehensively judge the degree to which mining is affected by the aquifers in the floor of each coal seam.

[0044] The water inrush coefficient method is used to determine the water inrush coefficient of each aquifer, and the critical water-blocking layer thickness of the floor that must be met by the water pressure of each aquifer is obtained. When calculating, the critical water inrush coefficient is taken as 0.1MPa / m under the condition of the intact floor section, and 0.06MPa / m under the condition of the floor section with structural damage, to determine whether the water inrush coefficient of the i-th aquifer meets the critical water inrush coefficient requirement. The mining damage depth of the coal seam floor is determined by the empirical formula method, the actual measurement method or the numerical method, and according to step one, it is determined whether the mining damage depth of the floor affects the i-th aquifer, and whether the i-th aquifer and its water inrush coefficient meet the critical water inrush coefficient, and the influence of the aquifer on mining is further evaluated.

[0045] The target aquifer can be obtained through the above analysis. In summary, the embodiment of the present invention can determine which aquifers have an impact on mining safety, etc. by evaluating the degree to which mining is affected by the aquifers in the bottom plate of each coal seam; by analyzing the aquifers affected by the depth of bottom plate mining damage, and by analyzing whether the water-conducting channels formed by the activation of geological structures caused by mining stress communicate with the aquifers, it can be determined which aquifers are affected by the mining behavior. These aquifers are all target aquifers described in this embodiment. Since the embodiment of the invention is based on a comprehensive and scientific evaluation method, the target aquifers with water inrush risks selected are also more comprehensive and accurate. For example, in the above analysis and evaluation of this embodiment, the spatial overlap relationship of the low-resistance abnormal area is combined to judge the probability of vertical hydraulic connection, and some aquifers with thick aquifers distributed below or affected by geological structures and having water-conducting channels with other aquifers can be selected. These aquifers are all aquifers with water inrush risks.

[0046] It can be understood that the target aquifers screened out based on the above method include both thick aquifers and thin aquifers. The significance of the present invention lies more in the screening of thin aquifers, because the screening of thick aquifers with the risk of water inrush is not difficult, while thin aquifers with the risk of water inrush require a more comprehensive evaluation to be fully and accurately determined.

[0047] It can be seen from the above that the embodiments of the present invention provide the above-mentioned comprehensive evaluation, which can screen out thin aquifers with water inrush risks, solving the problem that the prior art only treats water hazards in thick aquifers without considering that thin aquifers also have water inrush risks.

[0048] The following is an introduction to the classification construction mentioned above.

[0049] In an embodiment of the present invention, the general idea of ​​evaluating the impact of coal seam mining on the coal seam floor aquifer is to determine the scope of the mining damage depth and the activation of the geological structure induced by the mining stress into a water-conducting channel, and based on the said scope and the water-conducting channel, determine the degree of impact of mining on each aquifer in the coal seam floor.

[0050] In the embodiment of the present invention, after the target aquifer with water inrush risk is determined according to the evaluation results of the water inrush coefficient method, the evaluation results of the impact of the coal seam floor aquifer on mining, and the evaluation results of the depth of floor mining damage affecting the aquifer, it is necessary to classify and manage the target aquifer according to the hydrological parameters of the target aquifer. For example, if the i-th aquifer is selected as the target aquifer and the horizon to be managed, it is first necessary to determine which type the i-th aquifer belongs to. The specific types can be divided into the following four types in this embodiment: The first type is a weakly water-rich aquifer, or an aquifer with moderate water-richness, a permeability coefficient lower than a first set value, a thickness less than a second set value, and the presence of a local geophysical low-resistance anomaly area.

[0051] The second type is an aquifer with moderate water richness, a thickness less than the second set value, and the presence of local geophysical low-resistance anomaly areas.

[0052] The third type is an aquifer with strong water-richness and a thickness less than the second set value.

[0053] The fourth type is an aquifer whose thickness is greater than or equal to the second set value.

[0054] It should be noted that the embodiment of the present invention divides the aquifer into the above four types. Of course, in other embodiments, the number of types and the classification criteria of the aquifer can be different from those in this embodiment, and the present invention does not limit this. In this embodiment, the first setting value can be 1×10 -4 cm / s, the second setting value may be 20 m. In addition, the present invention refers to an aquifer with a thickness less than the second setting value as a thin aquifer, and an aquifer with a thickness greater than or equal to the second setting value as a thick aquifer.

[0055] For treatment options for each type of target aquifer, see Figure 2 , the embodiments of the present invention are selected as follows.

[0056] The treatment method for the target aquifer belonging to the first type is determined as hydrophobic and pressure-reducing transformation, the treatment method for the target aquifer belonging to the second type is determined as hydrophobic and pressure-reducing transformation or local grouting transformation, the treatment method for the target aquifer belonging to the third type is determined as grouting reinforcement of the aquifer or regional grouting transformation, and the treatment method for the target aquifer belonging to the fourth type is determined as regional grouting transformation.

[0057] Specifically, under the conditions of thin aquifers with weak to medium water richness, low permeability coefficient, and local low-resistance anomalies, it can be not regarded as the layer to be treated by grouting improvement, and only a sufficient-capacity underground drainage system needs to be equipped without affecting the mining operation. For thin aquifers with medium water richness, if the low-resistance anomaly areas are sporadically distributed, the treatment methods of dewatering and pressure reduction or local grouting improvement can be adopted, rather than the regional grouting improvement method. For thin aquifers with strong water richness, if the thickness of the aquifer to be treated by grouting improvement is very small compared with the thickness of the water-resisting layer at the coal seam floor, the treatment method of grouting and strengthening the water-resisting layer or regional grouting improvement of the aquifer can be adopted.

[0058] It should be noted that the division of weak water richness, medium water richness, and strong water richness described in the embodiments of the present invention can adopt the following criteria.

[0059] Weak water richness: the unit water inflow q of the borehole ≤ 0.1 L / (s·m). This means that within a unit time, the water inflow through the borehole is small, and the water storage capacity of the aquifer is weak.

[0060] Medium water richness: 0.1 L / (s·m) < q ≤ 1.0 L / (s·m). The water storage capacity of this kind of aquifer is moderate, and the water inflow within a unit time is between weak water richness and strong water richness.

[0061] Strong water richness: 1.0 L / (s·m) < q ≤ 5.0 L / (s·m). The water storage capacity of this kind of aquifer is strong, the water inflow within a unit time is large, and it is suitable as a water source.

[0062] It should be noted that the "local" and "sporadically distributed" in the above-mentioned local low-resistance anomalies and sporadically distributed low-resistance anomaly areas refer to one or two or a small number of them existing within a relatively large area range, which can be understood as small in quantity and small in area proportion.

[0063] In some embodiments of the present invention, refer to Figure 2, and the treatment plan is designed in a targeted manner according to the timing of treatment. The timing of treatment refers to the proximity between the time of bottom plate water hazard treatment and the time of excavation and mining, that is, the time between the two. Targeted design refers to determining the composition ratio of the slurry in the grouting transformation based on the proximity between the treatment time and the excavation and mining time, such as judging whether the time between the treatment time and the excavation and mining time is less than the third set value. If so, the proportion of cement components in the slurry is increased, and if not, the proportion of cement components in the slurry is reduced. Among them, the third set value is determined according to the actual situation, and in this embodiment, it can be about 60 days. That is to say, if the treatment time is short from the excavation and mining time, the cement content should be increased in the grouting design to shorten the slurry coagulation time and improve the slurry coagulation effect. If the treatment time is long from the excavation and mining time, the cement content can be reduced to extend the slurry coagulation time and improve the economic benefit.

[0064] In some embodiments of the present invention, water hazard control design is also performed for the overlapping of thin aquifers and other aquifers. Specifically, when there is an aquifer below the thin aquifer on the coal seam floor, and both require regional grouting transformation and control, a grouting design with high condensation strength and increased cement content can be used to control the thin aquifer, and a grouting design with low condensation strength and reduced cement content can be used to control the lower aquifer, thereby improving economic benefits.

[0065] In some embodiments of the present invention, see Figure 2 The flood control plan also takes into account the design of the construction site. Among them, the ground construction conditions include land acquisition, environmental protection, water and electricity, grouting, transportation roads, goaf, etc., and the underground construction conditions include limited personnel, working space, transportation conditions, water and electricity coordination, etc. Figure 3 Schematic diagram of the combined arrangement of conventional underground drilling and ground directional drilling provided by an embodiment of the present invention. Figure 3 As shown, for aquifers that require regional grouting transformation, ground construction is preferred, for aquifers that require drainage and pressure reduction, underground construction is preferred, and for aquifers that require local grouting transformation, underground construction is preferred.

[0066] In some embodiments of the present invention, see Figure 2 The water hazard control plan also considers the selection of drilling methods. Drilling design refers to ground directional drilling, underground conventional drilling and underground directional drilling. Directional drilling can be divided into parallel and intersecting types according to the arrangement relationship between the drilling trajectory and the formation contour line, such as Figure 4As shown. According to the evaluation results of the impact of aquifers on mining, the thin aquifers treated by hydrophobic pressure reduction can adopt the drilling design of conventional underground drilling, the thin aquifers treated by local grouting can adopt the drilling design of conventional underground drilling or underground directional drilling, the thin aquifers treated by regional grouting can adopt underground directional drilling or ground directional drilling, and for thick aquifers, the drilling design of ground directional drilling can be adopted. This embodiment combines conventional drilling treatment with advanced directional drilling treatment to achieve "taking advantage of each other's strengths and making up for each other's weaknesses, achieving the best effect".

[0067] From the above introduction, it can be seen that the embodiment of the present invention takes into account the actual requirements of the timing of treatment, treatment layer, treatment method, construction site, drilling design, and grouting design according to actual conditions, and can quickly form an effective treatment model and perform design intervention from various links, so as to quickly obtain a treatment method that is both safe and economical.

[0068] The present invention is based on the impact evaluation of coal seam floor aquifers on mining and the impact evaluation of aquifers on mining, rationally determines the management methods for aquifers under different hydrological conditions, forms a comprehensive evaluation and classified management approach for floor water hazard management, and comprehensively clarifies the various path links formed by the floor water hazard management model. According to actual conditions, the overall optimization of the management model can be achieved through active intervention and local optimization.

[0069] The following is a description of the device for determining a coal seam floor water hazard treatment plan provided by the present invention. The device for determining a coal seam floor water hazard treatment plan described below and the method for determining a coal seam floor water hazard treatment plan described above can be referred to in correspondence with each other. Figure 5 As shown, the device for determining a coal seam floor water hazard control scheme comprises: The risk aquifer determination module 501 is used to determine the target aquifer with water inrush risk based on the impact of each aquifer in the coal seam floor on mining safety and the impact of mining on each aquifer in the coal seam floor.

[0070] The aquifer type determination module 502 is used to determine the type of the target aquifer based on the hydrological parameters of the target aquifer.

[0071] The treatment method determination module 503 is used to determine the treatment method of the target aquifer as hydrophobic pressure reduction transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer based on the type of the target aquifer.

[0072] As to how each module in the device specifically works, it can be cross-referenced with the method for determining the coal seam floor water hazard control plan described above, and will not be described in detail here.

[0073] Figure 6An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute a method for determining a coal seam floor water hazard treatment plan, the method comprising: determining a target aquifer with a risk of water inrush based on the degree of influence of each aquifer of the coal seam floor on mining safety and the degree of influence of mining on each aquifer of the coal seam floor; determining the type of the target aquifer based on the hydrological parameters of the target aquifer; and determining the treatment method of the target aquifer as a hydrophobic pressure reduction transformation, a local grouting transformation, a regional grouting transformation or a grouting reinforcement aquiclude based on the type of the target aquifer. As for a more specific method, reference may be made to the method for determining a coal seam floor water hazard treatment plan described above, which will not be repeated here.

[0074] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0075] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for determining a coal seam floor water hazard control plan provided by the above methods, which includes: based on the degree of influence of each aquifer in the coal seam floor on mining safety and the degree of influence of mining on each aquifer in the coal seam floor, determining the target aquifer with a risk of water inrush; based on the hydrological parameters of the target aquifer, determining the type of the target aquifer; based on the type of the target aquifer, determining the control method of the target aquifer as hydrophobic pressure reduction transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer. As for a more specific method, reference can be made to the method for determining a coal seam floor water hazard control plan described above, which will not be repeated here.

[0076] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented by the processor to execute the method for determining the coal seam floor water hazard treatment plan provided by the above methods, the method comprising: determining the target aquifer with water inrush risk based on the degree of influence of each aquifer in the coal seam floor on mining safety and the degree of influence of mining on each aquifer in the coal seam floor; determining the type of the target aquifer based on the hydrological parameters of the target aquifer; and determining the treatment method of the target aquifer as hydrophobic pressure reduction transformation, local grouting transformation, regional grouting transformation, or grouting reinforcement of the aquifer based on the type of the target aquifer. As for a more specific method, reference may be made to the method for determining the coal seam floor water hazard treatment plan described above, which will not be repeated here.

[0077] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0078] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining a coal seam floor water hazard control plan, characterized in that: include: Based on the impact of each aquifer in the coal seam floor on mining safety and the impact of mining on each aquifer in the coal seam floor, determine the target aquifer with water inrush risk; Determining the type of the target aquifer based on the hydrological parameters of the target aquifer; Based on the type of the target aquifer, the treatment method of the target aquifer is determined as hydrophobic and pressure-reducing transformation, local grouting transformation, regional grouting transformation or grouting to reinforce the aquifer.

2. The method for determining a coal seam floor water hazard control plan according to claim 1, characterized in that: Based on the type of the target aquifer, the treatment method of the target aquifer is determined as drainage and pressure reduction transformation, local grouting transformation, regional grouting transformation or grouting reinforcement of the aquifer, including: Determine whether the target aquifer belongs to the first type; the first type is a weakly water-rich aquifer, or an aquifer with medium water-richness, a permeability coefficient lower than a first set value, a thickness less than a second set value, and a local geophysical low-resistance anomaly zone; If the type of the target aquifer belongs to the first type, the treatment method of the target aquifer is determined to be hydrophobic and pressure-reducing transformation; Determine whether the target aquifer belongs to the second type, the second type being an aquifer with medium water richness, a thickness less than a second set value, and having a local geophysical low-resistance anomaly area; If the type of the target aquifer belongs to the second type, the treatment method of the target aquifer is determined to be hydrophobic pressure reduction reconstruction or local grouting reconstruction; Determining whether the target aquifer belongs to the third type, wherein the third type is an aquifer with strong water-richness and a thickness less than a second set value; If the type of the target aquifer belongs to the third type, the treatment method of the target aquifer is determined to be grouting to reinforce the aquiclude or regional grouting transformation; Determining whether the target aquifer belongs to a fourth type, where the fourth type is an aquifer with a thickness greater than or equal to a second set value; If the type of the target aquifer belongs to the fourth type, the treatment method of the target aquifer is determined to be regional grouting transformation.

3. The method for determining a coal seam floor water hazard control plan according to claim 1, characterized in that: Prior to determining the target aquifer with water inrush risk, the method further includes: Determine the scope of the mining damage depth of the coal seam floor and the water-conducting channels connecting the aquifers formed by the mining stress; Based on the affected range and the water conducting channel, the impact degree of mining on each aquifer in the coal seam floor is determined.

4. The method for determining a coal seam floor water hazard control plan according to claim 1, characterized in that: Also includes: Based on the proximity between the treatment time and the excavation and mining time, the composition ratio of the slurry in the grouting transformation is determined.

5. The method for determining a coal seam floor water hazard control plan according to claim 4, characterized in that: Based on the proximity between the treatment time and the excavation and mining time, the composition ratio of the slurry in the grouting transformation is determined, including: Determine whether the time interval between the treatment time and the excavation and mining time is less than a third set value; If the time interval between the treatment time and the excavation and mining time is less than the third set value, the proportion of cement in the slurry is increased; If the time interval between the treatment time and the excavation and mining time is greater than or equal to the third set value, the proportion of the cement component in the slurry is reduced.

6. The method for determining a coal seam floor water hazard control plan according to claim 1, characterized in that: Also includes: Determine whether the thickness of the target aquifer is less than a second set value, whether there is an adjacent aquifer below, and whether the treatment methods of the target aquifer and the adjacent aquifer below are both regional grouting transformation; If the thickness of the target aquifer is less than the second set value, and there is an adjacent aquifer below, and the treatment methods for the target aquifer and the adjacent lower aquifer are both regional grouting transformation, then the proportion of cement components in the grouting transformation slurry of the target aquifer is increased, and the proportion of cement components in the grouting transformation slurry of the adjacent lower aquifer is reduced.

7. The method for determining a coal seam floor water hazard control plan according to claim 1, characterized in that: The regional grouting transformation is carried out by ground construction; the hydrophobic and pressure-reducing transformation and local grouting transformation are carried out by underground construction.

8. The method for determining a coal seam floor water hazard control plan according to claim 1, characterized in that: Also includes: Determine whether the treatment method of the target aquifer is hydrophobic pressure reduction transformation and the thickness is less than a second set value; If the treatment method of the target aquifer is hydrophobic and pressure-reducing transformation and the thickness is less than the second set value, conventional downhole drilling is selected as the drilling method; Determining whether the treatment method of the target aquifer is local grouting transformation, and whether the thickness is less than a second set value; If the treatment method of the target aquifer is local grouting transformation and the thickness is less than the second set value, the drilling method is selected as downhole conventional drilling or downhole directional drilling; Determine whether the treatment method of the target aquifer is regional grouting transformation, and whether the thickness is less than a second set value; If the treatment method of the target aquifer is regional grouting transformation and the thickness is less than the second set value, the drilling method is selected as downhole directional drilling or ground directional drilling; Determining whether the thickness of the target aquifer is greater than or equal to a second set value; If the thickness of the target aquifer is greater than or equal to the second set value, the drilling method is ground directional drilling.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, it implements the method for determining a coal seam floor water hazard control plan as described in any one of claims 1 to 8.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the method for determining a coal seam floor water hazard control plan as described in any one of claims 1 to 8.

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