45results about How to "Strong process" patented technology

The invention discloses a preparation method of an MLA resin film serving as an ore powder sample. The preparation method comprises the following steps: sample pretreatment, first-time cold inlaying, second-time cold inlaying, and grinding and polishing. According to the preparation method disclosed by the invention, by adopting a process of the sample pretreatment, the first-time cold inlaying, the second-time cold inlaying, and the grinding and polishing and two inlaying of the powder sample in sequence, high representativeness and high dispersion degree of sample granules are guaranteed; according to the ratios of resin and a curing agent, enough operation time can be guaranteed; meanwhile, standing and curing time of a resin sample is shortened; the whole flow has the advantages of short process flow, obvious effect, high practicality and low cost.

The invention provides a predication method for the depositing length of gushing mud in a water-bursting and mud-bursting hole of a tunnel. The predication method comprises the seven steps of: calculating out natural unit weight Gamma of a soil body and underwater saturation unit weight Gamma sat, measuring and calculating a buried depth z1 of underground-water level and a distance z2 from the underground water level to a tunnel arch crown, measuring the shape and size of a water-bursting and mud-bursting breach to obtain cross-section area A of the water-bursting and mud-bursting breach and measuring the undrained shear strength cu and the like. By application of the technical scheme, the use is simple and convenient, the process characteristic is strong, and the result is reliable, so that the water-bursting and mud-bursting disasters can be effectively prevented.

The invention provides a method for predicting the formation time of surface collapse of water inrush and mud inrush of a tunnel. The method includes the following steps: 1) calculating the buried depth H of the water inrush mud; 2) calculating the equivalent diameter D of the cross section of the tunnel fracture zone; 3) calculating the natural gravity of the soil within the fracture zone in thefracture zone , cohesion force c and internal friction angle, 4) Calculating the undrained shear strength cu of the soil within the fracture zone and the surrounding surrounding rock; 5) Calculating the breaking band at the unit height, the critical shear strength due to the looseness of the soil cu, cri, 6) Calculating The critical ratio r when falling of the fracture zone, wherein r=cu, cri / cu;7) Calculating the time required for the unit height to break down the belt t, wherein t=1.06r-16.85; 8) Calculating from the beginning of the water inrush Surface subsidence Time T, wherein T = tH. The invention provides a method for predicting the formation time of a tunnel water inrush mud surface, which has the advantages of simple use, strong process and reliable results.

The invention relates to a confined water stratum foundation pit bottom soil layer pile foundation reinforcing pile distance and pile length prediction method which is suitable for the field of foundation construction and comprises the following steps that stratum distribution in a site is determined; geological drilling is conducted in the site, the stratum distribution of the site is revealed, and the thickness of the soil body of the ith layer is obtained by the formula in the specification; the pressure of confined water is determined; the undrained shear strength and the weight of the soil body overlying each soil layer on the confined water of the site are determined; the weighted average undrained shear strength of the stratum soil body overlying the confined overwater according tothe depth, and the weighted average weight according to the depth are determined, wherein (please see the formula in the specification); the diameter of a driven pile foundation and the side length ofa pile cap are determined according to construction conditions; a pile distance is determined; the limit side friction force between the pile foundation and the confined water soil body is determined; and the length of the pile foundation is determined. The prediction method has the advantages of being high in process property and convenient to implement.

The invention relates to a method for predicting the impact force of a submarine landslide collapse block on a submarine pipeline, and the method comprises the steps: the cohesive force and internal friction angle of a soft soil body are gradually reduced below a hard layer under the action of a wave cyclic load to a critical value, the submarine landslides, the hard layer slides downwards and is torn into a collapse block, and slides towards the downside of a slope; firstly, the bottommost collapse block impacts the submarine pipeline, the instant impact force of the collapse block impacting the submarine pipeline is determined according to the momentum theorem, after the impact force is completed, the collapse block acts on the submarine pipeline in a static thrust mode, then the second row of collapse blocks impact the first row of collapse blocks, and the impact force acts on the submarine pipeline; and after the impact force is finished, the first row of collapsed blocks and the second row of collapsed blocks act on the submarine pipeline in a static thrust mode until the last row of collapsed blocks impact the submarine pipeline, and force in two modes of instant impact force and static thrust acts on the submarine pipeline.

The invention relates to a method for predicting the vertical bearing capacity of a vertical reinforcement of a karst soil cavity. The method comprises the following steps that the geometric dimensions such as length L, width W and height H and the soil covering depth of the karst soil cavity are determined; the number n, depth L<0> and diameter d of grouting holes of the karst soil cavity are determined; the compressive strength sigma<s>, the ultimate side friction q<s> and the ultimate end resistance q of the vertical reinforcement are determined; a characteristic value f<ak> of the foundation bearing capacity of a soil body at the bottom of the soil cavity is determined; a net area A<c> of the bottom surface of an enlarged body is determined; the ultimate bearing capacity Q<u1> jointly determined by a cylinder and the enlarged body is determined; the ultimate bearing capacity Q<u2> determined by the compressive strength of the cylinder is determined; the ultimate bearing capacityQ<u3> determined only by the cylinder is determined; the vertical ultimate bearing capacity Q of the vertical reinforcement is determined; and the vertical design bearing capacity R of the vertical reinforcement is determined. The method for predicting the vertical bearing capacity of the vertical reinforcement of the karst soil cavity has the advantages of simple structure, high process performance and reliable result, and can predict the vertical bearing capacity of the vertical reinforcement of the karst soil cavity more reliably.

The invention relates to an air-coal blowing furnace and a tin concentrate air-coal blowing furnace smelting method, belonging to the technical field of nonferrous metal pyrometallurgy. The air-coal blowing furnace includes a furnace body, a flue, a slag outlet, a tin outlet and a raw material inlet, and also includes an air-coal blowpipe and a pyrite inlet. The furnace body is in the form of a column, and the bottom of the furnace body is conical. The furnace body is divided into a concentrate smelting area and a slag fuming area, and the top of the furnace body is equipped with a raw material inlet and a pyrite inlet corresponding to the concentrate smelting area and the slag fuming area; the method is to first add tin concentrate, reducing agent And selectively add flux to smelt in the reaction zone of the concentrate smelting zone to obtain crude tin and tin-containing slag. After the crude tin is discharged, put pyrite in the slag fuming zone for fuming operation, including SnS smoke and dust volatilization collection, low-tin slag discharge. The method has the advantages of simple process, short process, safe and controllable process, convenient operation and good environmental benefit.

The invention relates to a method for predicting pulling down safety of a surrounding building pile base by blasting demolition of a dangerous bridge. The safety prediction method of the pull-down ofthe surrounding building pile base due to the dangerous bridge demolition blasting comprises the steps that bridge floor height H<0>, bridge floor width b, pier height H and bridge floor density rho are obtained; the bridge floor quality m per unit width is obtained according to the bridge floor height, the bridge floor width and the bridge floor density; the velocity v when the bridge floor contacts the ground is obtained; the largest impact load p<max> when the bridge floor contacts the ground is obtained according to the bridge floor quality, the velocity when the bridge floor contacts theground and the bridge floor width; the pull-down stress sigma<z> in the surrounding building pile base after the bridge floor contacts the ground is obtained; the pull-down load Q<n> generated by thesurrounding building pile base after the bridge floor contacts the ground is obtained according to the pull-down stress sigma<z>; the single pile vertical ultimate bearing capacity Q is obtained; and the pull-down safety coefficient SF is obtained according to the single pile vertical ultimate bearing capacity Q. The safety prediction method of the pull-down of the surrounding building pilebase due to the dangerous bridge demolition blasting has the advantages that the structure is simple, flow path performance is high, and using is convenient.

The invention discloses a method for predicting the subsidence depth of rock filling by explosive squeezing silt, comprising: obtaining the average equivalent particle diameter d of rock filling 50 ; used to obtain the rockfill density ρ 0 ; Used to obtain the density ρ, cohesion c and internal friction angle of the foundation soil at different depths to calculate the density ρ', cohesion c' and internal friction angle of the foundation soil after the explosion squeezed silt; calculate the subsidence pressure of the rockfill f; Calculate the subsidence resistance p at different depths of the foundation u ;set depth z i , the depth z i Located below the buried explosive charge, if at the depth z i The above subsidence pressure f is greater than the subsidence resistance p u , ie f>p u , while at the depth z i The following subsidence pressure f is not greater than the subsidence resistance p u , that is, f≤p u , then the depth z i is the maximum subsidence depth of rockfill. It has the following advantages: it can predict the subsidence depth of the rockfill foundation treated by explosive silting, and the prediction is simple, the process is strong and the result is reliable.

The invention relates to a hole position space prediction method for tunnel gushing mud desilting horizontal high-pressure grouting. The method comprises the following steps of determining the desilting gushing mud height H inside a tunnel and a slope angle alpha of a gushing mud slope surface; determining the cohesive force c<s>, the inner friction angle phi<s> and the weight r<s> of the tunnel desilting gushing mud; determining the cohesive force c<c>, the inner friction angle phi<c> and the weight r<c> of a high-pressure grouting body; determining the diffusion diameter d of the high-pressure grouting body; determining the integral normalized cohesive force c, the inner friction angle phi and the weight r of the grouting body and a gushing mud body after the high-pressure grouting; determining the unstability angle phi' after the grouting; and determining the hole position space s of the horizontal high-pressure grouting. The hole position space prediction method for the tunnel gushing mud desilting horizontal high-pressure grouting has the advantages that the flow process performance is high; the implementation is convenient; and the result is reliable.

The invention relates to an air coal blown converter and a tin concentrate air coal blown converter smelting method and belongs to the technical field of non-ferrous metal pyrometallurgy. The air coal blown converter comprises a converter body, a flue, a slag hole, a tin discharging hole and a raw material inlet and also comprises an air coal blow pipe and a pyrite inlet, wherein the converter body is a cylinder, the bottom of the converter body is conical, the converter body is divided into a concentrate smelting region and a slag fuming region, the raw material inlet and the pyrite inlet are formed in the top of the converter body and respectively correspond to the concentrate smelting region and the slag fuming region. The tin concentrate air coal blown converter smelting method comprises the following steps: firstly adding tin concentrate and a reducing agent, optionally adding a solvent, and smelting in the concentrate smelting region and a reacting region to obtain crude tin and tin-containing slag, discharging the crude tin, then putting pyrite into the slag fuming region for carrying out fuming operation including volatilizing and collecting SnS smoke dust, and discharging low-tin slag. The tin concentrate air coal blown converter smelting method has the advantages of simple technology, short flow, safe and controllable process and good environmental benefit, and is easy to operate.

The invention relates to a method for predicting the safety of a hammered pile body in a granite area, which can predict the safety of the pile body in the granite area and prevent the pile body from being damaged, and is characterized by comprising the following steps of: firstly, determining the weight and the maximum stroke of a diesel hammer, and detecting the diameter and the top surface burial depth of a boulder by a geological radar or cross-hole earthquake CT method; determining the radius of the precast pile, the axial compressive strength design value of pile body concrete, the compressive bearing capacity limit value of the pile body, the elastic modulus and Poisson's ratio of granite residual soil, the shear modulus of the granite residual soil and the instantaneous maximum impact force borne by the top surface of the precast pile; then determining the soil body side frictional resistance borne by a pile body, determining the soil body side frictional resistance borne by the pile body, the dynamic cohesive force of granite residual soil and the weight of the granite residual soil, finally determining the resistance of the soil body at the lower part of the boulder, and judging whether the pile body is damaged or not by comparing the instantaneous maximum impact force with the resistance. The purpose of preventing the pile body from being damaged in advance is achieved.

The invention relates to a method for predicting the vertical bearing capacity of a vertical reinforcement of a karst soil cavity. The method comprises the following steps that the geometric dimensions such as length L, width W and height H and the soil covering depth of the karst soil cavity are determined; the number n, depth L<0> and diameter d of grouting holes of the karst soil cavity are determined; the compressive strength sigma<s>, the ultimate side friction q<s> and the ultimate end resistance q of the vertical reinforcement are determined; a characteristic value f<ak> of the foundation bearing capacity of a soil body at the bottom of the soil cavity is determined; a net area A<c> of the bottom surface of an enlarged body is determined; the ultimate bearing capacity Q<u1> jointly determined by a cylinder and the enlarged body is determined; the ultimate bearing capacity Q<u2> determined by the compressive strength of the cylinder is determined; the ultimate bearing capacityQ<u3> determined only by the cylinder is determined; the vertical ultimate bearing capacity Q of the vertical reinforcement is determined; and the vertical design bearing capacity R of the vertical reinforcement is determined. The method for predicting the vertical bearing capacity of the vertical reinforcement of the karst soil cavity has the advantages of simple structure, high process performance and reliable result, and can predict the vertical bearing capacity of the vertical reinforcement of the karst soil cavity more reliably.

The invention discloses a proppant embedment and fracture conductivity quantitative forecast-based numerical simulation method. The method comprises the following steps of: S1, establishing a physical model for reducing the real sizes of proppants; S2, applying closing pressure on the surfaces of an upper rock stratum and a lower rock stratum of the model, wherein the difference between average heights of granules on fracture surfaces of the upper rock stratum and the lower rock stratum is a fracture closing width w; S3, carrying out flow field grid dispersion on a filling layer to ensure that a flow field is wrapped by the proppants, setting viscosity and density of a fluid and pressure of the fluid at two ends of the flow field; S4, calculating a total flow q of the flow field; S5, calculating a permeability and a flow conductivity; and S6, changing physical parameters of the rock stratums or the fluid, and drawing a change curve graph indicating that the conductivity of the proppants with different sanding concentrations changes along with closing stress. The method has the beneficial effects of simulating the real processes of fracture closing, proppant embedment and interaction between granules and fluids, so as to effectively forecast the dynamic change of the flow conductivity.

The invention provides a method for predicting the formation time of tunnel water and mud inrush surface subsidence, comprising the following steps: 1) calculating the buried depth H of the water and mud inrush breach; 2) calculating the equivalent diameter D of the cross section of the tunnel fracture zone; 3) Calculate the natural weight γ, cohesion c and internal friction angle of the soil in the broken zone 4) Calculate the undrained shear strength c of the soil in the broken zone and surrounding rock u ; 5) Calculating the critical shear strength c of the broken zone per unit height due to soil loosening u，cri , 6) Calculate the critical ratio r when the broken zone slides, r=c u，cri / c u ;7) Calculate the time t required for the unit height broken zone to slide down, t=1.06r ‑16.85 ; 8) Calculate the total time T from the start of water and mud inrush to the formation of surface subsidence, T=tH. The invention provides a method for predicting the formation time of surface subsidence of water and mud inrush in tunnels, which has the advantages of simple use, strong flow and reliable results.

The invention relates to a calculation method for predicting the embedding depth of proppant considering the softening effect of shale. The self-absorption depth-soaking time curve was obtained; the standard cores under different soaking times were dried and then subjected to nano-indentation experiments on the surface respectively to obtain the Young's modulus-soaking time curve of the core surface; the softening layer was established by the finite element method. The proppant embedding model is obtained; numerical simulation is carried out to obtain the embedding amount-soaking time curve: the calculation formula of the proppant embedding amount considering the softening effect is obtained. The assumptions considered by the numerical model of the present invention are closer to reality, and the simulated and predicted fracture width values ​​under different softening conditions have a high fit with the measured values, and at the same time have strong flowability, which can be used for actual shale reservoirs. Accurate and efficient prediction of fracture width after layer hydraulic fracturing.